♪ mr. martin what are we going to do about these children ♪ ♪ these are the words of the restavec ♪ >> the earthquake affected 3 million people, a third of haiti's population. and as you've seen in our documentary, the youngest victims are considered the most vulnerable in the aftermath of this disaster. many organizations have created programs to help provide for the thousands of children left to fend for themselves. to find out more about how you can help make a difference in the lives of these children, go to cnn.com/impact. i'm soledad o'brien. thanks for watching. -- captions by vitac -- www.vitac.com >> larry: tonight, could aliens from other worlds conquer and colonize planet earth? ask your physicist steven

hawkings says it's possible and issues a warning for all of us. stop trying to contact other life forms now. just in case they're out there and they're hostile. >> they are likely to be more advanced than us. >> larry: hawking joins us, answering our questions, sounding the alarm. believer dan aykroyd is here too. >> i don't thing they're a mass threat. >> larry: aliens from outer space. real threat to the human race? next on "larry king live." good evening. you could say this show tonight is out of this world. john smithson is executive producer of "into the universe" with steven hawking, as it ben buoy, both join us from london. in their documentary, astrophysicist steven hawkings will join us later, warns contact with extra terrestrial

life may not go so well. watch. >> so if aliens ever visit us, i think the outcome would be as when christopher columbus first landed in america. which didn't turn out very well for the native-americans. >> larry: john, do you -- you're produces ting the show. do you accept the theory? >> well, we're working with one of the greatest living scient t scientists, one of the best scientific brains in the world. i'm not a scientist. my job on the discovery channel was to bring the views, imagination of the great scientist to a mass audience. these are the words of professor hawking. i am not -- don't have the scientific credentials to second guess professor hawking. i'm prepared to believe him because he is such a great scientist, and what we said

about aliens in that program was very much what steven hawking wanted to say. for years he had been lecturing about the -- about lots of things including the possibilities of alien life. what we are able to do, for the first time using the wonders of computer graphics, was to visualize with professor hawking hypothetically what they might look like. that's what we're able to do here. >> larry: ben, you did this come about? how did you and steven and john all get together and do this. >> well, discovery wanted to do a new siexciting show. we sat around the table a while and thought who best to do it? there isn't a bigger name than steven hawking. it was a very simple, short, short list for who we wanted to work with. then we pitched it to him, and you may know this even takes quite a while to respond to

questions. we gave him our pitch, showed him a tape and had to wait a while, but thankfully the answer was yes, i'd love to do it. that's how it got going. >> larry: john, are you surprised at the reaction it's gotten around the world? >> no, i'm not, because, you know, professor hawking is this distinguished academic as we've said, but also he wants to bring science to a new generation, to people around the world. and he's prepared to -- everything he says is scientifically sourced. he wants to entertain people and by entertaining them he wants to interest them in science. so, you know, every -- this was done really incredibly closely working with steven hawking for three years on this. and he really did want to somehow popularize, you know, his view, the universe inside his mind. so i think he leapt at that

chance of doing a series that was both totally big-deal science, definitive science about what we know about the cosmos, but in an educating and in an informative and in an entertaining way, so that a global audience on discovery channel could be sort of interested in this. >> larry: ben, does the british government take this seriously? >> i'm not -- i'm not sure i'm qualified to answer that, but i don't think so. >> larry: john -- no, ben, you first. the tendency has been to kind of dismiss this until mr. hawking arrived as sort of cooky. he says if intelligence aliens exist and they were to meet us, that's another big if, we might be wise to treat them with caution. it's not steven saying, as far as i know anyway, steven is not

saying i ining aliens are comine to hide under the bed. he's saying if you follow the argument logically we'd be wise to exercise caution when dealing with aliens. >> larry: what do we do with this, john, oath e than entertain and inform us? what's the next step? >> the next -- well, what we're trying to do with this -- what -- you know, what's just so amazing about this subject? it blew my mind. i'm not a scientist. what blew my mind is just the huge scale of the universe. i'll never look at the night sky the same way again. the three years we've been making the show, someone told me the other day 300 billion stars have been born. 300 billion stars have died. these are awesome figures. what we're doing next really is just, what literally what we're doing next on sunday night is the ultimate story on the discovery channel. the ultimate story of how it all

began 14.7 billion years ago. and how might all end. it just, it's really beyond ultimate story. >> larry: let me get a break and come right back with john smithson and ben buoy. steven hawking, by the way is coming up. first, how would we respond if alien life landed on earth? chlor-trimeton relieves itchy, watery eyes and sneezing for 12 full hours with less drowsiness than benadryl. it does all that? chlor-trimeton. less drowsy relief that lasts 12 hours. i switched to a complete multivitamin with more. only one a day men's 50+ advantage... has gingko for memp$y and concentration. plus support for heart health. ( crowd roars ) that's a great call. one a day men's.

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>> larry: do you believe in life, in other places, other planets? >> life appeared on earth very soon after the earth was formed 4 1/2 billion years ago. that suggests life will appear spontaneously on any suitable planet. on the other hand, intelligent life seems very rare. it has wret to be detected on earth. >> larry: steven hawking has a great sense of humor. in 1977 a radio signal was

received, called the wow signal. take a look. >> on august 16th, 1977, a radio telescope in ohio picked up a signal that became famous. the signal was a steady source of radio waves, just the kind an alien race might send, because it stands out from the radio static that fills the universe. a computer recorded the signal as six letters and numbers. astronomer jeremy erman saw the data and wrote one word in the margin. >> larry: this is a remarkable, remarkable entertaining feature that will air on discovery sunday. john smithson and ben buoy are the executive producers of "into the universe" with steven hawking. this would be an opinion, ben.

do you think we would be hostile or not hostile to another environment coming here? >> do i think -- i don't think you can really say. i think the only thing you can say is you don't know. if you don't know caution seems to be the most sensible approach. so i'm not one to call whether aliens will come here and stroke us and pet us or zap up with lazers. i think we just don't know, and, therefore, you can't really say. you can't say one way or another. you can just think that maybe caution would be a good idea. >> larry: steven theorizes the negative aspect, does he not, john? >> he rightly thinks we should be cautious, and i'm in the going to second guess professor hawking. that is what is so intriguing, isn't it, about this whole subject? could there be life out there? if so, is that just some sort of green gloop or something that's a real menacing threat? that's what we don't know.

many better scientific minds than mine are obsessed with looking. i think you've got guests later who tells a lot more about that. it's just totally intriguing. it's been the subject of literature, it's been the subject of movies, and think it is one of the most intriguing questions of all, which is why -- is one of the questions steven hawking, himself, wanted to deal with in the series. because it really is one of the big questions we all face. are we alone in this planet of ours? and we're talking, you know, even if it is one in a billion then there are billions of stars. we're playing a big numbers game here. >> larry: was this fun to do? is he easy to work with? >> it is fun but it's probably the most complex and challenging program i've ever been involved with because you're dealing with the most ferociously complicated story, most ferociously complicated science imaginable, but we were trying to make it in a way that people like myself could understand.

so it was -- it was brain numbingly difficult, but also really good fun. and steven hawking is just a remarkable man. i mean, he -- he just has this presence. everyone feels it. we did something with him last night in london, and the whole room stops when he comes in. he has, you know, it's weird. we almost talk of him as a rock star of science. he has this extraordinary aura about him, and we just know that trapped in this body that he can't use is this quite brilliant brain. there's something about that that's such a powerful and pointed image, it seems to touch people. >> larry: john smithson, ben buoy. the second part of this special will air sunday on discovery. we'll be back. we'll talk with steven hawking, and we'll meet an expert panel as well. steven hawking in his own words, next.

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if civilizations take billions of years to evolve only to vanish virtually over night, sadly we have next to no chance of hearing from them. they are simply too far away in space and time to reach. but there is one last possibility. that aliens who have avoided destroying themselves are already colonizing the universe. >> larry: we're back. in a new discovery channel documentary, astrophysicist stephen hawking said communicating with aliens could be a threat to earth. hawkings says it's likely alien life exists and that a visit from extra terrestrials might be similar to columbus' arrival in the americas. in other words, didn't turn out too well for native-americans. joining us are dr. micio, futurist, physicist, newest book "physics of the impossible: a scientific exploration of the

world of fazers, force fields, teleporation and time travel." seth, senior astronomer. david brin, astronomer and futurerist, and our friend, the well known actor dan aykroyd who believes alien life is exists. we wanted to hear directly from the renowned british scientist, former guest on this program, stephen hawking about this controversial claims. i sent him some questions. here are his answers. do you think there will ever be direct contact between the inhabitants of earth and alien life? >> it's nice to see you again, larry. after ten years. i think we may find primitive life, but it's unlikely there are intelligent aliens within 100 light years or we would have detected their radio signals. >> larry: if contact does occur, will it -- do you think it will be initiated by us or by them?

>> they are likely to be more advanced than us, so they will contact us first. >> larry: you're warning that it may be too risky to try to contact space aliens has created a debate. do you care to react to some of the criticism those who say the search for extra terrestrial life is central to space exploration? >> i think we should look out for primitive life. if advanced life exists they will contact us. aliens haven't contacted us so far except maybe in the state of arizona. >> larry: in your mind, what would an advanced alien look like? >> they are bound to have a mouth opening because they will have to take nutrition, and they will probably have legs because they will need to move around. and they will eat us, but don't

expect them to look like marilyn monroe. >> larry: should we ban messages in the universe for fear of attracting dangerous aliens? >> it is too late. if they are looking they will already have detected us. >> larry: thanks for joining us. stephen hawking. >> good-bye, larry. i hope to see you this fall when my new book, "the grand design," is released. thank you. >> larry: what do you make of his thinking? >> i think first of all, don't quit your day job, larry. don't sell the store. the aliens are not going to invade any time soon. i think what stephen is doing is giving us a wake-up call. in the next few months to years we have two satellites that are going to detect earth-like twins with life on them. when we look at the earth sky in the next few years we have to

get used at the fact that people are going to be staring back at us. we're going have a shock when they announce they have found earth-like planets in space. >> larry: seth, you buy it? >> well, of course i buy that, but look, i think what stephen hawking it saying, we're going to hear from them first. that's what we try to do in the study business. we have big antennas scanning the skies looking from signals from civilizations quite far away. there's no danger in that, of course. you tune in the radio and don't have to worry about the deejay jumping into wrr home and giving you a hard time. that's a completely harmless thing and interesting thing, what will tell you whether earth is really, really special, whether there's enormous quantities of life out there. >> larry: david, one thing it has done with stephen hawking about it, it has opened many eye, hasn't it? >> oh, yes, the problem is that everybody seems to have their own idea, of course, what aliens ought to be like.

we all say, of course, our broadcasts have been already been detected by now. when seth, himself, has calculated and most of the astronomers have calculated that our tv broadcasts actually dissipate pretty soon after their leave our solar system. it's these narrow beams that are being sent out from taxpayer-paid observatories. like arasibo and in ukraine that are causing the fuss. without consulting the taxpayers, without consulting the governments, without consulting fellow scientists at all in other disciplines. these people have taken it upon themselves to act on their assumptions that aliens are universally altruistic and it's not the beamed messages we object to, those of us who have been decenting lately, but rather the arrogance of not talk ing to anybody else on this

planet before assuming they have the right to do this. >> larry: by the way, the images you're seeing, of course, are image and imaginations. dan, how do you contrast what david, who is saying that -- what do you really know? >> well, thank you for including hollywood constituent here. i'm a newfound consultant for hollywood. i have to speak for them today and also for hollywood, we made pretty good movies about this. "e.t.," "close encounters," "indiana jones," "cone heads" and "the day the earth stood still." he specifically referenced a july 1952 sighting. no astrophysicist of his credibility and reputation has ever actually mentioned a ufo sighting. to those of the community, we

sit up right away and please continue to focus where there might be planets but also accept the fact they may have been coming and going here for many years. in fact, i believe they're in violation of title 18 section 202, paragraph "a" of the united states code which says whoever abducted someone is libel to criminal prosecution. if you know the story of betty hill, travis walton, the nebraska highway patrol man, he spoke of representable witnesses, hawking, callahan of the faa -- >> larry: i have to get a break. you're making a strong point. why do they land in wyoming? why not new york? washington? >> i'll tell you that later. >> larry: chicago. maybe we'll get answers ahead. family cars of 2009." the insurance institute for highway safety calls it a "2010 top safety pick." consumers digest has called it a "best buy" two years in a row. and with a 100,000 mile powertrain warranty... we call it peace of mind. chevy malibu.

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>> larry: i love that. stephen hawking weighed in on what alien life might be like on

other parents. >> the laws of physics appear to be the same everywhere. so it follows that the laws of life should be universal, too. even if the detail is different. we can use life on earth as a kind of alien hunters' handbook. a field guide to what life actually is and how it works. no matter where it occurs. >> larry: doctor, you're a renowned physicist. you accept that? >> well, yeah. life is going to be, i think, found throughout the universe. however, i don't think they're going to want to come and strip mine the earth. there are a lot of planets out there that are probably uninhabited, without restive natives. if you're a camper are you going to sit down where there are a lot of scorpions and tarantulas and rattlesnakes? you're going to go where it's nice and clean of pests. why would they bother with the earth when there are lots of pristine planets with resources out there, no real point to mess with the natives. it's not going to be like

columbus meeting a native-american and genocide. think more like the vietnam war. okay? an intelligent species may say it's not worth it to get the nate ifs angry. >> larry: "avatar." did you see it in. >> i did. great movie. >> larry: you liked it. as a physicist you liked it? >> it eepen s open. s up worlds. could have oceans under the ice cover. >> larry: seth, isn't it all kind of incomprehensible? isn't it, with exception of the doctor, isn't this larger than -- you can't imagine it. i don't know what i'm going to have for lunch. >> well, i hope it's not unimaginable, because after all, we're trying to imagine it and not only doing that. we're trying to do an experiment, right? we'd like to know if it is true out there. i agree they're not going to come here and strip mine the planet. in the movie they go to pwork o

cost of transport, like ordering a book from amazon and paying $6,000 for shipping. could the aliens come here for some oath reason? possibly. david brin said they might not pick up our television but might pick up our very strong radars. look, if they have the technology to come here, and actually threaten us, they long ago could have the technology to pick up our signals. they'll know we're here. >> larry: david, sack succinctly put, what do you believe? >> that's the whole point, larry. i've been thinking about the alien, discussing the alien with everybody i could for the last 50 years and what i believe is that everybody is too strong in their beliefs right now. the search for extra terrestrials is called the only topic without a subject matter. and everybody gets passionate. they believe that they would have seen our signals by now. they believe that space flight is impossible, which is the

standard position, or that if there are aliens out there they'll be all true westic. i'd like open conversation about this. >> larry: dan, suspect it true we know a little bit, but there's so much we don't know. and the answer to the question is why don't they land in l.a. and new york, dan? >> first of all i'm glad this is grounded in real science. i can't wait to see the discovery special, but they don't land here. they only land in isolated places. they have taken people, i believe. they do have technology. lord hill norton of the british defense staff says -- >> larry: why not new york? >> -- that he believed 23 different species are coming -- because they don't want anything to do with us. i don't think we will ever have a formal relationship, a formal contact with any alien species out there, especially after 9/ 11. when we broke our toys in the sand box. if they were observing that, good-bye human race.

i don't think they're a mass threat but i think they're breaking the law. >> larry: how do you arrest them? >> that's the -- the fbi should be on that. i don't think they're a mass threat. if you want to save lives in this country, teach people to drive better, remove cocaine appetite in the united states and stop people from texting while driving. i look at this through the entertainment filter, larry. >> larry: that's why you're going to do another ghostbusters and i'm going to be in it again. >> you bet. we're working on it today. i got into one of the best schools in the country!

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at this scale each point of light is an entire galaxy, which not only puts our little world in perspective, but also makes it difficult to believe we really are alone. >> so to my mathematical brain the numbers, alone, make

thinking about aliens perfectly rational. >> larry: one thing true, this subject will never go away. the discovery channel documentary discusses several theories about how life originated on earth and how it could also have originated on other planets. watch. >> it is extremely unlikely life could spontaneously create itself. i don't think there's a problem with this theory. it's like winning a lottery. although the odds are astronomical, most weeks someone hits the jackpot. but there is another intriguing idea which says that life would have originated somewhere else, and being spread from planet to planet by asteroids. >> larry: doctor, in your opinion how did it all start? >> probably on the earth. probably in the oceans where

there's liquid water. we physicists always say follow the water. liquid water is the amniotic fluid of life where -- >> larry: isn't water redundant? >> it's common out of space. comments are made out of ice. liquid water is the most precious substance in the universe. we have a lot on earth. >> larry: why here and why then? because there was water? >> yeah. we think water is the mixing bowl for dna getting off the ground. >> larry: is there water on other planets? >> liquid water does not exist outside the earth other than maybe a satellite of jupiter. we think it's a precious commodity. that's what we look for in united states, the presence of water, especially liquid water. you ask the question, why don't we see them, why don't they make contact with us? maybe they're so advanced we're not even on their radar screen. we're so arrogant to believe they're going to want to land on the white house lawn. if you see an anthill in the forest you go down to the ants

and say i bring you trinket, i bring you nuclear energy, is that what you do when you see an ant hill? >> larry: that concept sounds interests. do you factually believe they're there? >> well, in my heart of hearts, larry, obviously i think we're there. otherwise i wouldn't be doing this research. look, the study institute's building a new antenna in northern california, the alan telescope. this thing will be able to greatly accelerate the search. the fact we haven't picked up a signal so far, that's been mentioned several times here, doesn't mean a thing. we barely scratched the surface. it's the next 20, 30 years that counts. i think we may find a signal, otherwise i wouldn't do this job. i did want to say something to dan aykroyd who thinks they're here, the question we should contact them is somewhat moot. how many times does he go to the l.a. airport and sit on the plane and the captain says we're going to delay our departure a

little bit because there are unidentified objects in the area and the faa wants us to stay on the ground? >> remember, chicago -- >> i remember chicago. >> remember chicago. what was that? was that a weather anomaly, something punched through a cloud. >> it was a weather anomaly. >> i don't believe it was an anomly. i support study. go to. i don't think they're calling. i don't think they called the night they took barney and betty. >> larry: david has nasa discovered anything? >> well, the whole -- we could go on for hours about paranoid theories like ufos. i personally find the ufo aliens unlikely because the number of cameras is doubling every single year. and the grays they're talking about are such tedious boring versions of aliens. i support seth in i have supported all my life. i think it's been shone recently setty needs to change track.

it has failed to see the garish, huge garish beacons frank drake expected out there, said he should keep looking, they may be farther away. it turns out what we should be looking for is more of those wow signals and you do that not with a single telescope, but with 10,000 amateur telescopes in backyards all over the world. and this system could make sure that all parts of the sky were being watched all the time. and then we might see that wow signal come back. because calculations show that's how the aliens would far more likely try to communicate. >> larry: science fiction films have had good alien lines. how come? well if you're hurt and can't work it pays you cash... yeah to help with everyday bills like gas, the mortgage... ...and groceries. it's like insurance for daily living. so...what's it called? uhhhhh

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>> larry: we're back. comedian stephen colbert had fun with hawking's views on alien life encounters. >> he is back with a new tv series, "into the universe with

stephen hawking." here, here is what he had to say about the prospect of man kind encountering aliens. >> the outcome would be such as when christopher columbus first landed in america. which didn't turn out very well for the native-americans. >> why do the aliens get to be columbus in this scenario? i think we humans have a track record. it's there on man kind's resume. 50 words per minute, power point, smallpox. >> larry: you could have a lot of fun with this. do you accept the humor of it? >> i do. and we think hollywood likes david versus goliath stories. it could be goliath versus the mosquito in real life. they could be that advanced. however, goliath is not going to go where there's a swamp of mosquitos. even though our technology may be primitive compared to goliath it's not going to be a one to one combat like in science

fiction. >> larry: as an older physicist, what puzzles you the most? >> what puzzles me the most is the question, why aren't they here? if they're so expansive and so galactic in their scope, and billions of more years advanced. i think the answer to me is pretty clear. we're not on their radar screen. we're simply too insignificant to them. >> larry: is there any science fiction movie that came close to capturing what you think might be? >> at the risk of sounding somewhat self-promoting here, obviously the movie "contact" which portrayed the work of the institute. i obviously like that one because the science was pretty accurate. carl sagen wrote the story. when foster goes out to space to meet her dad on another solar system, that was not accurate. that film was good when it came to the science. >> larry: david, do you have a favorite science fiction film? >> oh, there are so many. i -- i worry that we're

concentrating so hard on things that can be filmed. i mean, i've had movies, and sure they're entertaining, but it's in the science fiction novels where you actually get serious thinking about what aliens might be like. and then the next novel says, yes, but -- and the next says yes, but -- we need to bring this conversation out into the real world where people can maybe watch you chair three or four hours of scientists really getting at it. because the historians have a lot to say. the biologists have a lot to say. and they have not been consu consulted -- >> larry: i would volunteer immediately to do that. dan, didn't you make a film about your stepmother being an alien? >> well, yes, but i also made "do "cone heads." one note to david brin, if fop o

photographic evidence isn't there, the agentgy has been wasting his life. talk to bruce david and he'll show you how he's broken down photos, prove ones that are hoax and ones that seem to be genuine photos of aircraft performinger a aerodynamically more than we. >> larry: why don't the stories make the front pages of "the new york times"? >> they do all the time. there was a recent article in "the new york times" in one of the subsections about an duing visiting at medical universe of new york and discussing their experiences. it's very entertaining to me. let's keep it grounded in science but please accept maybe the reality is maybe they are here coming to treat us like the ants the doctor talks about and that really ultimately in the end they will not want anything to do with us because we're basically pretty bad. >> larry: i got it, all right,

hold it. does the united states have some kind of official policy with regard to aliens? that's next. (announcer) feeling back pain? dr. scholl's back pain relief orthotics with shockguard technology give you immediate relief that lasts all day long. dr. scholl's. pain relief is a step away. communities. industry. energy. her. this. lives. how ? by bringing together... information. ... people ...

... machines ... ... systems ... ideas... verizon helps businesses worldwide... including fortune 500 companies... find and achieve... better. better. better. better. >> larry: by the way, dr. kaku's newest book is "physics of the impossible: a scientific exploration of the world of farzs, force fields, teleoration and time travel." is there a government policy about this? >> well, we used to have the blue book. the government used to monitor these things, but then it shut it down and lost interest. and then, you know, the uk and other countries have looked as

these things, but pretty much they're not taken seriously. however, i personally believe that 95% of these sightings can be dismissed, but 5% of them really give you the willies. 5% of them cannot be explained easily using the known laws of physics. that doesn't mean they're not natural, just difficult to explain. >> larry: seth, do you believe in the area 51 or the new mexico story of hidden bodies? do you believe that? >> no -- well, no, larry, i don't believe that aliens came 500 or 1,000 light years to enjoy some tex-mex cuisine in in the southwest and in the last 50 feet made a navigation error and crashed into the dirt. i don't think there's the case. the government does have one policy when to comes to extra terrestrial life. there's a whole office of planetary protection within nasa and it's not to defend us against the aliens as you would in the movies but simply to make sure if we bring rocks back from mars or send rockets to mars we don't contaminate either planet

by carrying the biology alongside so we don't mistake martian life or earthly like vice versa or bring a passage back into earth. >> larry: dan, why doesn't the government treat it seriously? dan first. >> sorry, david. i think the government has. they've been interesting for years. there's footage in the '50s from air force swregenerals and majo going on tv saying we know you saw something, we're not sure what it was. joint army and navy air force publication number 146 specifically instructs pilots and navy aviators, if you see one of these things, don't talk about it. assist breach of national security. the air force has been very interested. the memo says we have to look into these things, they're aerodynamically advanced. and there is something here. the airports have lost interest, but they have been interested and i think are today still. >> larry: david, is that true? >> i want to speak up for humanity in two ways. first off, michio is completely

right that the earth was prime real estate for 2 billion years before we came around. we see no signs, even in the geology of the rocks, if they had tossed a coke bottle or emptied their la between trene in our oceans we would have seen the traces. so the paradox, the great silence stretches on a big time and it is the big question of why we're alone. but i want to speak up for people in america. these retired, crotchety old engineers would have been speaking up a lot more if they had been in area 51, if there had been a roswell. do you know any engineers? >> larry: let me get a break. we'll try to close on that. we just, as usual, skimmed the surface. time for another "lar we king live" moment from my 25 years here at cnn. i spoke to bill cosby in 1997 at his childhood home in philadelphia about the toughest thing any parent can endure -- the loss of a child.

we're at 919 perish place, apartment "a," philadelphia. the grow-up home of bill cosby. >> ennis was very, very small and i brought him by here, because i wanted him to see where i grew up. ennis said he wanted to go home. he told camille that i took him some place and tried to prove to him that life was rough, but he didn't believe it. >> larry: i've known bill cosby for a long time, interviewed him many times. the hardest setting for anyone is death to begin with. >> we were all there and ennis was coming home. and we put the coffin in the place and everybody went to look at him. i didn't go. i don't want to see my son like -- i have memories. >> larry: how a guy could go on after a child has died is incomprehensible to me. i would never go on. one great thing you must have seen, as you saw all over the

world, is the love people have for you. >> and the family. >> larry: and the caring. >> you never really know what people judge you by if you hit the mark and you made them very, very happy. and i mean to continue to do that. >> larry: you're an ace. >> watch your mouth. ace of what? >> larry: hearts. >> thank you. >> larry: you can see this and other clips at cnn.com/larryking. and we want your help in ranking the top five. make your picks and we'll reveal what you decide the week of may 31st. you may win a trip to meet me, see the show, we'll have dinner. be back after this. you could end up taking 4 times the number of pills... compared to aleve. choose aleve and you could start taking fewer pills. just 2 aleve have the strength to relieve arthritis pain all day.

>> larry: we've about run out of time. dan aykroyd, sum it up. your opinion is, succinctly, what? >> that they're here, science

should accept that they're here and look where they come from where they're coming from. they have abducted people, but i say, go, seti, go, because maybe the nice ones will call. >> larry: what do you believe, dr. kaku? what do you know know? >> i believe "a" they're out there but "b" they're malevolent. the next time you hear "abducted," please, swipe a paperweight, swipe a pen. we have some alien dna, alien technology. that will settle the question right there. >> larry: seth, what do you believe? believe believe? >> well, i believe that we ought to keep looking. the big question is, is earth a miracle or is life just a cosmic infection? i think the latter's probably true, but let's go look and prove it one way or another. >> larry: david, what do you believe? i'll close with dan in a minute. david, what do you believe? >> i believe that 15 years ago, we knew of no planets outside our solar system. now we know of 500.

we are lea and it's not time to be yelling yo-hoo into the universe when we're the children in the jungle. let's keep learning and stop being so certain. >> larry: in this lifetime, dan, will we ever learn the truth? >> yes, i think a revelation is coming on a mass scale very soon. i don't know what form it's going to take, but there's a lot of witnesses out there. get on the website, let's keep it grounded in science, but please, there's just so much foet graphic evidence. ted phillips gathers trace elements all the way around the world from these landings. >> larry: thanks, guys. >> thank you, larry! and this is the planet that created "satisfaction," the great keith richards song. that's a miracle. >> larry: as you know, oprah winfrey is heading up the no-phone zone initiative, and as of today, i'm taking the no-phone zone pledge. i'm challenging otheo