let's break-in in derek pitts, the chief astronomer at the science museum. good to see you. it must be exciting to see the creation of a new crater. >> it's always exciting to see something like this. it reminds us as comet hunter david leafy said that the solar system is under construction. every once in a while we see one of these systems on the moon, and we have the capability to survey on a regular basis. >> the rock was going 38,000 miles an hour and the force the equivalent of exploding 16 tonnes of dynamite triple the size of a collision seen before. if an object that size makes it through our atmosphere and hits the earth, what would the consequence be. >> if we eliminate it falling into the ocean or less populated regions of the planet a large crater would be created. it could cause widespread destruction, and the kind of event that we don't want to see happen. fortunately there's not as many of these event taking place any more as there were in the early history. we haven't seen anything like this in recorded history, except for one that happened in 190 #, -- 1908,

derek pitts, it's always great to see you. australian scientists have discovered the oldest star, 13.6 billion years ago. what does it tell us about the universe? >> what it tells us is a little bit more about the early history of the universe and it helps to go a little bit of the way toont t antonio is what came first, the chicken or the egg. the galaxies are the stars, the stars this old or stars that were created so long ago, when you find that they can give us a little bit of a picture about what things were like way back then. and we find that in stars like this they're very, very low in that composition of elements beyond hydrogen and helium. and this means that they were not really invested with lots of heavy elements from the destruction of a star in that portion of space previously, that might have exploded in such a way to provide all of those extra elements that we find in much younger stars these days. so we can look back and try to get a better understanding of how those first stars began, what the energy environ

derek pitts. >> thank you, jon. no little green men yet but chance to buy beachfront property soon. wn a deposit. dr. pitts, thank you. jenna: i prefer the beach frond property than the little green guys just for the record. jon: i think they come with the territory. jenna: more than a dozen people go into the hospital for surgery. now we're learning they may have left with a deadly incurrable disease. we'll tell you where. >>> also a terrifying day on the job. a construction worker dangling from an overpass. more on this heart-stopping accident next. jenna: big developments on the top stories and breaking news. jon: after 10 days of testimony and dozens of witnesses, prosecutors rest their case in the amanda hayes' murder trial. a look at what the defense will try to do now. a potential break in a cold case nearly four decades old. the new link in the case of two sisters who vanished back in 1975. and scaffolding snaps leaving a worker dangling from underneath an interstate overpass. the daring rescue all happening now. a republican plan to raise the debt ceiling is now scrapped. he

derek pitts from the franklin stint tut science muse science mu semi. >> it's exciting to see things like this, antonio. it reminds us as comet hunter david lfshing said, the col solar system is under construction. every once in a while we will see one of these collisions and we have the capability on the basis so we can record the events. 38,000 miles an hour and the force of the impact is believed to have been the equivalent of exploding 16 tons of dynamite, triple the sues of the biggest collision. managed to make it through our atmosphere. >> if we can eliminate the falling into the ocean, we see a large crater. larmingly heavily populated area. >> it could cause widespread destruction. it's a kind of ent we really don't want to see happen. there aren't as many of these taking place. any more in the solar system as they were in the early history, so we haven't seen anything. the history of what was going on back in 1908, the tunguska effect. last year, a large item exploded over the city. >> both of those happened in russia. what else can we learn about potential collisions here

he got it off in time, and the qs now 24-0 escaping pitt with a dramatic victory, 58-56. >>> yankee great derek his final season in major league baseball. he's retiring after this year. ace fans do not have fond memories of jeter. he made one of the greatest plays of his career game. giambi would not slide and the flip by jeter to jorge posada. making plays like that for 19 seasons hampered by injuries the past few years, five-time world series champs, first in yankees history in games played at bats, hits, stolen bases and supermodels. >>> shawn doolittle only 14 years old when he made that play. he's not had to deal with jeter and that crew in the playoffs. jeter is hoping a third trip to the post-season will be the charm. >> we know we have a team that's good enough to get past that first round and make some noise. just like we did the year before, find a way to this new temperature. we have some new guys and new rules and that sort of thing. >> hard to imagine the raiders bringing gary mcfadden back. >> if you have, in your cfl fantasy league, sheets averaged almost six years per carry. nin

pitt. syracuse is down a point with the orange about to inbound the ball. watch. >> he hit the shot! derek it! >> how about that? freshman tyler inin this with the game winner. syracuse and wichita state are the only two major teams that have not lost a game this season. play of the day. >>> 6:26 right now. a house in san francisco's twin peaks collapses and slides down a hill. what the investigation reveals about the construction work happening at the time of the accident. >> reporter: did a bart police officer overstep his bounds when he used a taser on a man on a bart train? we'll show you the video. you can decide for yourself coming up next. ,,,, ,,,,,,,,,,,,,,,,,,,, >>> your realtime captioner is linda macdonald. >>> another massive winter storm causing problems on the east coast. now canceling flights here in the bay area. i'm kiet do with a live report coming up. >>> starting out with some fog around the bay area this morning. but we could have another storm coming our way. we will tell you when in just a few minutes. >> and we'll have the latest on an accident affecting some city