Penelope Boston: Life on Mars? Let's look in the caves

http://www.ted.com So the Mars Rovers didn't scoop up any alien lifeforms. Scientist Penelope Boston thinks there's a good chance -- a 25 to 50 percent chance, in fact -- that life might exist on Mars, deep inside the planet's caves. She details how we should look and why.

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Duration : 19분 56초
Lisence : youtube
자막 : 있음