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Einstein. that eclipse showed beyond a doubt that light binds when it goes around a sun during an eclipse. that was the instant that we physicists said ah-hah, relatively is correct and einstein is a genius. that was 100 years ago during that solar eclipse. >> trace: i don't get it. how did we get the theory of relativity out of the eclipse. the bending of light? >> right. newton says that apples and oranges bend when you throw them in a gravitational field. a flashlight we thought goes in a straight line in a gravitational field. no. light from distant stars bend as they go around the sun, wh...

The disc of the sun. that's only temporary. we physicists know the moon is leaving us at the rate of 1 1/2 inches per year. do the math. in a full more million years, we won't have anymore total eclipses. enjoy them while you can the next few million years. >> trace: 600 million years is about the right time. we're looking at argentina. it's in the lower left-hand side of the screen, a little crease there. in the sun. that's the moon creeping in. that's what michio says in an hour or so will make the total block. is it true, michio, or is this a fairy tale that animals, when the total solar ec...

intensified. the army shelling its own people as the arab world steps in to try to end the slaughter of civilians. and an all-out brawl at the mall. police with guns drawn, shoppers scrambling for exits. chaos after christmas on this "american morning." -- captions by vitac -- www.vitac.com good morning. it's tuesday, december 27th. this is "american morning." i'm alina cho along with ali velshi. good morning. >> good morning to you. >> we're so glad you're with us today. >> there's a lot going on. let's get right to it. starting in iowa. it's the place to be this morning. five t...

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...

It's like winning a lottery. although the odds are astronomical, most weeks someone hits the jackpot. but there is another intriguing idea called panspermia, which says life could have generated somewhere else and been spread from planet to planet by asteroids. >> larry: dr. kaku, 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 dna got off the ground. >> larry: isn't water redundant? >> ice is actually quite common out of space. comets ...