To tree or not to tree, that is the question. Umbra says 'tis nobler to tree. The real question is, what kind?
Portland? Nope. Seattle? Not even close. Here are your answers, from the brainiacs at Walk Score.
LightSail could offer a low-cost and reliable way to propel small satellites. Plus, it's cool!
The railroad industry says 2014 was its safest year on record -- but a close look at the numbers isn't going to make you feel very safe.
A new Yale-led study shows that worms and other soil-dwelling critters could help curb carbon emissions and fight global warming.
The GOP presidential hopeful has been a vocal supporter of the ethanol industry -- except when he bashes it.
Read what bin Laden had to say about global warming and Pakistan.
The Vortex bladeless turbine uses the wind to vibrate instead of spin. That makes it cheaper, quieter, and more reliable than a bladed turbine.
Watch this video for inspirational stories of family, mushroom hunting, and more.