Whales are mammals, and their ancient ancestors are thought to have lived on land. So did whales ever have legs? Read more about it here.

From McMurdo Station, this is the 4th post in Robin Bell's description of science in Antarctica in late 2008 and early 2009. Read more about it here.

Neil Sampson, president of a company that consults on forests and climate, said that private forest owners play an essential role in keeping wooded land growing and healthy.... and Americans who don't own wooded land still reap the benefits of forests.

Geologist Jean-Philippe Avouac talks about using satellite imagery to study earthquakes in this 8-minute podcast.

Reading about the polar expedition and coming face to face with it are two very different things. Read more on walking in Robert Scott's memories.

For several weeks our AGAP project team has been battling the delays of Antarctic spring weather. Read more in "Held hostage by weather".

Read about the economics of recycling

Hydrogeologist John Gates talked about water quality problems in China such as increasing salinity, nitrate pollution, and falling water tables. Read more.

According to Neil Sampson, an international forestry consultant, forest ecosystems are always in a state of transformation, but climate change might speed up the process.

New reports indicate that ocean acidification is becoming a real problem in waters off of Washington State and could affect...