Humans have irrevocably changed the planet. Have those processes gone so far that Earth’s biosphere has begun to resemble a human brain?
Cosmic Relief with David Grinspoon
Astrobiologist and S&T contributing editor David Grinspoon explores the possibilities for life on other planets, and what that means for life on Earth. Follow his musings from his regular Cosmic Relief column in Sky & Telescope.
1–20 of 43 results