Sea ice in the Alaskan Arctic drifts from east to west, meaning polar bears have to walk eastward just to stay in the same place. However, sea ice has started moving faster in recent years, forcing bears to work harder. Learn about the causes and consequences in my podcast for Scientific American.
Something’s killing Seattle’s coho salmon, and now, scientists know what it is: road runoff. Learn how they figured it out, and what cities can do to help, in my podcast for Scientific American.
If you’ve ever stood on a white sand beach in Hawaii or on coral atolls the Maldives, you were actually standing on a giant pile of parrotfish poop. According to a new study, these animals play an integral role in converting reef coral into the sediment that forms and maintains coral reef islands. Learn more … More Islands of parrotfish poop?
Alaska’s glaciers have been disappearing at an alarming rate, producing a torrent of melt water that contributes to sea-level rise. However, scientists are unsure whether most of the ice loss has happened through slow surface melting, or through the dramatic collapse of floating tidewater glaciers like the Columbia Glacier (below). Somewhat surprisingly, a new study … More Baking Alaska’s glaciers
Researchers have found evidence that smoke, for instance, from forest fires, can make tornadoes more frequent and more severe. Hear the full story in my podcast for Scientific American’s 60-Second Science.
It sounds crazy, but new scientific evidence suggests it’s true: lightning may play an important role in breaking down mountain tops. To learn more, check out my latest podcast for Scientific American’s 60-Second Science.
Believe it or not, scientists still don’t know exactly how or when Earth got its water. Most think water must have come later, delivered by meteors or comets, but a new study suggests it may have been present from our planet’s birth. Find out why in my podcast for Scientific American’s 60 Second Science.