Probably smaller than you think! A new study reveals what may be the most accurate penis-size measurements to date. Let’s cut to the chase: According to the team’s analysis, the average flaccid penis is 9.16 cm (3.61 inches) long and the average erect penis is 13.12 cm (5.16 inches) long.
Researchers have discovered a 2.8-million-year-old jawbone that is not just the oldest Homo fossil ever—it also pushes back the origins of our genus by 400,000 years.
Conventional wisdom holds that too much salt is bad for you. But now, a new study shows that dietary salt could actually be an immune-booster. Researchers report that high levels of salt in mice’s skin help them fight off bacteria—and that humans may also stockpile salt at infection sites.
The U.S. House of Representatives could vote to approve two controversial, Republican-backed bills that would change how the U.S. Environmental Protection Agency uses science to inform its policies. Many Democrats, scientific organizations, and environmental groups are pushing back, calling the bills thinly veiled attempts to weaken future regulations and favor industry. White House advisers say they will recommend that President Barack Obama veto the bills if they reach his desk in their current form.
People are nicer to each other when they think someone is watching—especially if they believe that someone can punish them even after they’re dead. That’s why some scientists think that moralizing religions helped people cooperate and encouraged societies to grow. Now, a study suggests that an omniscient, moral god isn’t necessary to keep people in line—all you need is the threat of supernatural punishment.
Einstein’s general theory of relativity turns 100 this year, and just wait until you see our birthday present. Check out how scientists are still testing the theory; learn about the search for gravitational waves; and find out how well you remember the man himself with our quiz about Einstein’s most famous quotations. And best of all, meet the world’s newest superhero: General Relativity!