Learning from Past Extinctions In this talk, biologist Anthony Barnosky discusses Earth’s five mass extinctions and whether current species declines may be part of a sixth mass extinction.
Extreme Life of the Sea In this talk, marine biologist Stephen Palumbi compares threats to biodiversity in the ocean to threats on land.
Ocean Species Respond to Climate Change In this talk, marine biologist Stephen Palumbi discusses how coral reefs are threatened by climate change and how to protect them.