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Welcome to the Scientific American podcast Science Talk posted on June 21st, 2012.

I'm Steve Mursky.

On this episode,

we always wonder how tiny we are compared to the vastness of the universe.

But that's because we compare ourselves in the three dimensions of space.

But now think about the four dimensions of time.

There we're not tiny at all.

Our entire heritage goes back to

those microbes which existed here for billion years ago. That's Dimitar Sassilov. He's professor

of astronomy at Harvard and the founder and director of the Harvard Origins of Life Initiative.

He's also the author of the new book The Life of Super Earths, How the Hunt for Alien Worlds and Artificial Cells Will Revolutionize Life on Our Planet.

He was in New York City recently and dropped by the Scientific American offices.

You've been quoted as saying that biology is the future of astronomy.

So let's start there.

What does that mean?

...