i'm phil torres joined by davison.know the internet at all you've probably seen the face of commander chris hadfield. i got a chance to interview him. >> making space travel and this whole idea so cool again. it's fantastic. >> give us a with it into his world and a way for those of us that aren't living on the international space station to kind of have an understanding of what that experience is like and maybe imagine ourselves in space one day. >> and i had a chance to talk to him about all those amazing things. let's take a look. >> five four three two one and liftoff. tom and ivan and chris making their way to the international space station. >> international space station has long been a paragon of mystery, that is until one man brought it back down to earth. >> chocolate pudding cake, looks like it too. not bad. it is going to be hard to eat. going to be messy. >> chris hadfield the former commander of the international space station spent 166 days in space. but he didn't spend his time just doing experiments. i

i'm phil torres, joined by shini somara, marita davison, and cara santa maria.e are in for a treat. shini - you just got back from on amazing journey to one of the most spectacular places in the world. please tell us about it. >> well, it was an absolute dream come true mission that i was on. i went to greenland and i was mapping glaziers with n.a.s.a. on a peace-free aircraft. the views were stunning. let's take a look. i travelled half a world away to get to a case some call the canary in the coal mine when it comes to climate change. greenland. i was here to observe an n.a.s.a. mission called operation icebridge. since 2009 n.a.s.a. has been flying airborne missions out of kangaloosa, a former u.s. airbase. the goal is to measure changes to the arctic sea ice and the ice sheet over greenland. we are just on our way to the air base and i am feeling kind of a bit nervous. i'm not the most relaxed of flyers. so let's see what happens. >> it was 6am, and about 10 degrees farenheit. >> so it's usually about a quarter of a mile walk to the plain. whatever condition

. >>> hey, guys, welcome to "techknow", i'm phil torres, joined by marita davison, and kosta grammatis. marita, you met a man who spent years as a crime scene investigators for human victims. now he and his lad is taking on the fourth largest industry in the world, it's a tragic. >> yes, we think of forensics dealing with human victims, we don't think of it as a bird. it's a wildlife services add, taking on the illegal trade in endangered species problem. >> some lines are extinct. how big is the industry. >> in terms of economic value, a $19 billion industry. techknow had an inside look at the c.s.i. forensic lab. >> reporter: the world's animal kingdom is under siege. since 1970 animal populations declined on average by half, according to estimates by the world wildlife fund. a big driver is wildlife trafficking. illegal trade in wildlife is a big global business, worth at least $19 billion a year. that makes it the fourth largest criminal industry in the world. right behind drugs, counterfeiting and human trafficking. it's been connected to organised qaeda. >> the rhinoceros, one of

i'm with costa and marita davison. instead of science, let's talk football. now, i'm a broncos fan.n i saw what the 49ers did with their new stadium, i'll feel bad every time the broncos beat the niners. >> if their game is half as good trouble. >> when you think n.f.l., small does not come to mind. it's full of big excitement and business. don't think of it in terms of being a big player. the stadium may be poised to change that. i got to check out environmental advances. >> reporter: it's game day at levi stadium, home of the san francisco 49ers, at first glance the scene in the parking lot it classical football - tailgating team revalry. san francisco football is changing the playbook. >> we pushed architects and engineers to think about everything that could be green. >> reporter: in trying to win the green game. this is the n.f.l.'s new arena, and the team behind says it has series green credentials. >> it's a good snapshot of the full court. >> reporter: there's 189 solar panels producing enough energy offset by the 2,700 tv and other power guzzlers during the home game. there

marita davison is a biologist specializing in evolution.ht, fracking. >> i looked out my front door

. ♪ ♪ ♪ julian davison: snow-capped mountains and icy fjords with bearded warriors in horned helmetsng forth in long boats. those are the first images that come to mind when one thinks of norway. so perhaps it's no coincidence that in the 19th century the descendants of those long ago vikings were also responsible for constructing... one of the most spectacular railways in northern europe.

johnson was davison's mcclellan, that's exactly right. i guess the advantage there goes to lincoln because he got rid of mcclellan and sooner than davis got rid of johnson. >> host: during davis' presidency was he ever nationally beloved? was he a great hero of the south or did that really belong to the generals? it's my impression that davis became a beloved hero of a lost cause after the war and his long lifetime after that. he survived lincoln by 24 years. did the first love of the south during the war belonged to lee and stonewall and not jefferson davis? >> guest: yes that's true. on the other hand i don't think davis was as unpopular among the ordinary people in the confederacy as the image we might have from the newspapers and h

both of them have a love for riding motorcycles so imagine their surprise when bill davison, of harley davidson said pick a bike, any bike on the floor. >> it was pretty much with all of us we weren't expecting that. it was just a blessing really. >> i don't think about post traumatic stress disorders when i'm on the bike. >> each of these brand new 2015 bikes retails for close to 30 grand but to them it is worth way more than just money. >>> at 4:56 are you waiting for hours, even when you have an appointment to see your doctor? what primary care physicians are saying about why they are experiencing an increased work load. >>> the eagles are recovering from a tough loss that every within on the team is feeling today, we're breaking down highlights and less than an hour big daddy graham joining us to talk about just what went wrong. >>> developing right here at 4:00 o'clock a man gunned down on the streets of philadelphia, we're bringing you details as they unfold, but first, sue serio, watching a nor'easter. >> here we go again, do you remember day before thanksgiving i think it could