Ancient kangaroo teeth hold clues to the role of climate change in ancient extinction In a mass extinction event some 40,000 years ago, Australia lost 90% of its large species. New research suggests climate change played a much smaller role than once thought, though not all agree. Ari Daniel
3D printing makes child prosthetics more affordable and flexible Prosthetics for children can be expensive because they need to adjust to their growth.
Survival of the luckiest? New study hints at the potential role of luck in evolution A new study on mice shows that luck in early life can determine success as an adult, especially when competition is high. Jonathan Lambert
Bezos' Blue Origin is nearing liftoff on the 1st flight of its newest, biggest rocket New Glenn, developed by the private space firm founded by billionaire Jeff Bezos, is on the pad at Cape Canaveral, Fla., and could launch on its maiden flight as early as Friday. Scott Neuman
Study in mice shows how luck factors into success The findings show that luck in early life can determine success as an adult, especially when competition is high.
NASA hedges its bets on costly Mars rock mission NASA has announced it is moving forward with several plans to return rock samples from Mars. Nell Greenfieldboyce
Tiny fish on ketamine may show how drug eases depression In zebrafish, ketamine causes changes a brain circuit involved in "giving up." That may help explain how the drug helps people with depression. Jon Hamilton
The National Zoo's giant pandas make the most of DC's snow The two giant pandas were seen on camera playing around in the snowfall that blanketed much of the Midwest and mid-Atlantic on Monday. Alana Wise
32 dolphins have died since an oil spill near southern Russia, experts say A dolphin rescue center said most of the dead dolphins were from the endangered Azov species. The Associated Press
Night owl or early bird? Here's how your inner clock impacts your health In order to better understand her circadian rhythm, science journalist Lynne Peeples conducted an experiment in which lived for 10 days in a bunker, with no exposure to sunlight or clocks. Tonya Mosley
