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

Dr. Babs Soller has worked for a decade on a wearable, non-invasive sensor that uses light to measure the metabolic rates of astronauts. She said data from this sensor could be used for hospital patients on Earth to avoid life-threatening situations.

We and Earth are part of a single system. We affect nature, and nature affects us, in endless cycles.

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.

The president of a forestry consulting firm talks about the market for carbon offsets - tradeable measures of a forest's proven capacity to store carbon. Find out how it works.

No one - not scientists, not environmentalists, not policy makers - wants an ecological catastrophe. No one wants to see people hungry, either. Read about the GM wars.

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

Biologist and author Paul Ehrlich talks about the single biggest step forward in all of human history. Read more about human culture and its evolution.