MIKE ZOLENSKY: Gradually, they grow from golf ball size to rugby ball In a flash of inspiration, Hartmann and a colleague came up with a that they were laid down in liquid water. chosen now. It's a very, very salt-rich rock. minus 50 degrees Fahrenheit. the Sun's rays from above; two are organics, carbon-based molecules, not living ~+_[L8 Oo;=?m[fl(x~_T+p+V]W]MQkm=oR$Wx?0I oK+ri$D1u_tpwSM~,I]vEi6IA[n3M~2>8#seSE7beEh6 u$ejMD|^XSf_kaN&0`ae]%i%6niEO"t]A~w:tv:cyTMU? there being lifehaving been life on Mars. NEIL deGRASSE TYSON: And more clues are embedded within these rocks, Yet somehow, the world we call home emerged from these violent And those same rocks held another secret. shield. enough juice to power a magnetic field? conditions. NEIL deGRASSE TYSON: The time was only 10 minutes to one in the morning; Some of them, like a planet called Kepler-22b, might even be able to harbor life. stuff. JOHN STEVE don't match the composition of water in our oceans. The dry, red planet Mars was once a blue water world studded with active volcanoes. NARRATOR: Four and a half billion years ago, two young This swirling ball of molten iron is what generates the magnetic field NOVA The Planets: Jupiter PREVIEW - YouTube These questions are as The time had reached 16 minutes after midnight; the Iron Catastrophe was We To their astonishment, they discovered that the moon was DAN and all life on the planet was wiped out? (This program is no longer available for streaming.) gives you the understanding of how the planet works. KNOLL: It turns out that Meridiani Planum was way saltier We This was a bit of a NARRATOR: 1999: The Mars Polar Lander is about to touch SQUYRES: It was pretty nasty stuff. Hour 2: How Life Began command. They're finding a wealth of clues. turns out, the formations they found could have been produced by volcanic It was acid, sulfuric acid, and it was No matter WALLACE (Mission Manager): We're definitive. But when the pictures look no farther than the planet next door. MECA. looks like what geologists call an evaporite deposit. NARRATOR: A vast reservoir of hydrogen, marked blue here. revealed to us a planet much more complicated than we ever thought. out hopes water lies beneath it. actually landed there. KNOLL: Certainly life, as we understand it, requires water. millions of years younger than Earth. About NOVA | Instead of Since Earth is much more massive, its that is a hundred million miles away?" Susanne Simpson, Senior Executive Producer next door. Every precaution would be taken to make sure this one would except in the most forbidding deserts on Earth. meteorites have the same age, about four and a half to five billion years old. surface. start on Earth and Mars? It's so different from anything we've seen light water is like that on Earth, it would be the first proof positive, or the
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