There's a great piece at Popsci.com today on the Scariest Ideas in Science. It's all research that's well-funded: from drugs that keep soldiers up for 48 hours, to man-made black holes. The scariest to me was Russian killer foxes that are getting selectively bred to be more and more hostile?! In any case, you can check out the lot of "˜em here at Popsci.
Belly Flop Physics 101: The Science Behind the Sting
BY Kirstin Fawcett
July 23, 2017
Belly flops are the least-dignified—yet most painful—way of making a serious splash at the pool. Rarely do they result in serious physical injury, but if you’re wondering why an elegant swan dive feels better for your body than falling stomach-first into the water, you can learn the laws of physics that turn your soft torso a tender pink by watching the SciShow’s video below.
Saltwater is common around the world—indeed, salty oceans cover more than two-thirds of the globe. Typical saltwater found in our oceans is about 3.5% salt by weight. But in some areas, we find naturally occurring saltwater that's far saltier. The saltiest water yet discovered is more than 12 times saltier than typical seawater.
Gaet’ale is a pond in Ethiopia which currently holds the record as the most saline water body on Earth. The water in that pond is 43.3% dissolved solids by weight—most of that being salt. This kind of water is called hypersaline for its extreme salt concentration.
In the video below, Professor Martyn Poliakoff explains this natural phenomenon—why it's so salty, how the temperature of the pond affects its salinity, and even why this particular saltwater has a yellow tint. Enjoy: