Learn about animals, weather and natural disasters, alternative energy, environmental politics and space.
Thu, Apr 17, 2014 1:55 PM
Our planet is now passing through debris left by Comet Thatcher, which hasn't visited the inner solar system since 1861.
Fuel-cell advocate Daniel Emmett on why wary greenies should embrace new technology.
Author Kenn Kaufman's series of books includes texts on lesser-known reptiles, moths, birds and mammals.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.