Estrogen and progesterone can trigger the production of pain-killing substances by special immune cells located near the spinal cord. (Image credit: theasis via Getty Images) Experimental studies in animals have shown that the female sex hormones estrogen and progesterone may…
Northern giant mouse lemurs are able to mate year-round thanks to an abundance of food, and scientists believe this explains why males have such large testicles. (Image credit: Russell Mittermeier – Own work, CC BY-SA 4.0
During the birthing process, kangaroos have a total of three vaginas. (Photo credit: Mark Anderson via Alamy) Kangaroos have some pretty unusual external characteristics: they're the largest marsupials on the planet, they hop and use their tails as a fifth…
Ziv Nitzan discovered an ancient Canaanite amulet at Tel Azeka, the site where, according to the Bible, David defeated Goliath. Emil Aladjem/Israel Antiquities AuthorityThe Canaanite artifact depicts scarabs, which were widely used on seals and amulets in ancient times. Ziv…
Recent research sheds light on how Pangea broke apart 135 million years ago. (Image credit: Discovery Access via Getty Images) New evidence suggests the break between South America and Africa 135 million years ago was a turbulent event. The breakup…
Thousands of rubbery blue “windblown sailors” are washing up on California beaches as a result of shifting winds and ocean currents. (Image credit: MediaNews Group/Orange County Register via Getty Images via Getty Images) Thousands of rubber sea creatures are filling…