The SETI Institute's Allen Telescope Array (ATA) searches our galaxy for radio signals from potential intelligent alien life.
Credit: SETI Institute
Each week we uncover the most interesting and informative articles around, here are 10 of the coolest stories in Science this week.
Alien math: It is likely, with the size of the universe, that life exists somewhere out there. After doing the math, one scientist posits when found, the aliens will be the size of bears.
[Full Story: Aliens Will Be Bear-Size, According to Math]
Tongue worm fossil: An important discovery of parasite and host was recently uncovered. The invader was in the process of invading the host when the two were fosilized together.
Female testosterone: Current elite athletic competitions bar female competitors from competing if their testosterone levels are too high. Women are calling this unfair because not enough studies have been conducted as to normal levels for women or for how levels may or may not affect women's performance in competition.
Snake toes: An ancient ancestor of the snake had ankles and toes, as discovered in a comprehensive study of ancestral snakes. What was uncovered was two separate ancestral lines for snakes and snakelike creatures.
[Full Story: Snake Ancestor Had Ankles and Toes]
Odd panda find: Panda poop shows the animals do not have the correct enzymes to digest bamboo. The enzymes probably are from an ancestor who was an omnivore — meat and plant eating animal — and the panda just doesn't take part in the meat.
[Full Story: Panda Poop Reveals They're Bad at Digesting Bamboo]
The Egtved girl: Studies of an ancient grave reveals the girl buried inside was foreign to the area where she was found. Tests of her fingernails, teeth and hair linked her to southern Germany.
[Full Story: Remains of Bronze-Age Cultic Priestess Hold Surprise]
Who made these tools? A more than 3-million-year-old stone tool is actually older than any known humans. The discovery has led to more questions as to when tools were first used and who used them.
[Full Story: World's Oldest Stone Tools Predate Humans]
Why Americans don't trust atheists: Americans connect atheism to death and hold more tightly to their own values when talked to about atheism. A recently released report suggests when people think about atheism they also think about death, as strongly connected as if they were asked to think about death.
[Full Story: Atheists Inspire Thoughts of Death in Many Americans]
Future travel? A new train track system is being tested in California. The "Hyperloop" will move passengers at over 700 mph in low-pressure tubes.
Deadly game: A recently released report indicates when people participate in breath-holding contests the likelihood of drowning. The report notes several cases of teens and young adults intentionally holding their breath and pushing themselves too far.
[Full Story: Underwater Breath-Holding Games Can Be Deadly]