Would you rather go rock climbing, or stay home? Neuroscientist Mike Cohen said looking for excitement may be hardwired into your brain.

Strobel thinks that with more research, the fungus could prove to be a prolific source of clean, renewable energy.

EarthSky spoke with Dr. Jay Giedd, a neuroscientist at the National Institute of Mental Health, about lingering questions on nature versus nurture.

Jo Pierce owns a private forest in rural Maine. When you're working with trees, he says, you have to think on the timescale of a tree.

Henry Cisneros, former U.S. Secretary of Housing, on 'new urbanism.' What it means is front porches, back yards, green space, sidewalks that work...

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.

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.

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.