Nova Season 0 Episode 4 -

Airdate: 2002-Jan-01

Episode summary:

Five mass extinctions have occurred since life began on Earth. Are humans causing the next mass extinction? And what does evolutionary theory predict for the world we will leave to our descendants?

About Nova series:

A weekly documentary series, each episode providing an in-depth look at a different subject of scientific research. Subjects examined by this show ...Show more >