Big Picture Science – To Earth and Back

by Gary Niederhoff on May 21, 2012

We are all Martians … or could be, if, billions of years ago, Red Plant microbes fell to Earth and eventually evolved to us. Okay, that one’s a big “if.” But microbes can survive space travel. Meet the NASA officer whose task is to keep Earth, Mars – and the entire solar system –safe from hitchhiking bacteria.

And, even if we’re not Martians (darn!), did life once thrive on the Red Planet … and does it still today?

Plus, why meteorites may be happy habitats for life.

Listen to individual segments here:
Part 1: Planetary Protection
Part 2: Life on Mars
Part 3: Exploring Mars
Part 4: Meteorite Hunt
Part 5: Nature’s Spaceships
Part 6: Alien Invasion

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