A new environmental record for a prehistoric site in Kenya helped researchers figure out how external conditions influenced which of our ancient ancestors lived there, with what way of life.
Fire debris flowing into Murray-Darling Basin will exacerbate the risk of fish and other aquatic life dying en masse in a repeat of the shocking fish kills of last summer.
Sand may seem abundant when your toes are buried in it, but it's becoming scarce along many coastlines around the world.
Why did Earth's climate rapidly cool 12,800 years ago? Evidence is mounting that a comet or asteroid collision is to blame, with new support coming from the bottom of a South Carolina lake.