How Do We Know: Salty Seas

  • Published: November 3rd, 2010

Ocean salinity can have a big impact when it comes to changing climate. Learn how scientists are monitoring our salty seas.

How Do We Know: Proof in the Pixels

  • Published: October 27th, 2010

Dr. Heidi Cullen talks to Dr. John Townshend about his current research which tracks rainforest deforestation.

How Do We Know: Ocean Acidification

  • Published: October 12th, 2010

The atmosphere isn't the only place carbon dioxide caused by human activity goes.

How Do We Know: Sea Level Rise

  • Published: October 5th, 2010

A warming planet could mean that sea levels rise three or more feet by the end of this century.

How Do We Know: Greenland’s Melting Ice Sheet

  • Published: September 22nd, 2010

Climate change is turning a lot of Greenland's ice to water. But, how do we know?

NEEM: Ice Cores Tell of Climate History

  • Published: August 3rd, 2010

Dr. Jørgen Peder Steffensen explained the goals of the North Greenland Eemian Ice Drilling project and what the ice cores can tell us about our climate history.

Wind Energy

  • Published: April 29th, 2010

Why do we get less than 2 percent of our energy from wind?

What Does Nuclear Power Cost?

  • Published: April 28th, 2010

We don't know what it will cost to build the next nuclear power plant in the U.S.