Sep 18, 2013 — Science may seem advanced, may even be advanced, but that doesn't mean there aren't still plenty of questions left to ask and answer. A new book catalogs 20 of the biggest questions outstanding. Physicist Marcelo Gleiser looks the list over and ponders some of the subjects keeping scientists awake at night.
Mar 19, 2013 — The tropical island set in turquoise water just off the Great Barrier Reef is the site of an experiment to see what will happen to coral reefs as the ocean absorbs ever more of the carbon dioxide and heat we've added to our planet's thin skin. The results weren't so pretty.
Jul 11, 2012 — About 95 percent of life on Earth disappeared 252 million years ago. The causes seem to be surprisingly close to what is happening now due to climate change.