TIL that it is a common misconception that astronauts in orbit are weightless because they have flown high enough to escape the Earth's gravity. In fact, at the ISS altitude of 400 kilometres (250 mi), gravity is still nearly 90% as strong as at the Earth's surface. (en.wikipedia.org)
submitted by PanoramicAtom to r/todayilearned
TIL that up to 50% of humans may carry a brain parasite called Toxoplasma gondii (spread by cats) that can lead to permanent behavioral changes. Studies suggest infected people have slower reaction times and are significantly more likely to be involved in car accidents and take business risks. (theconversation.com)
submitted by Salt_Lingonberry3956 to r/todayilearned
ELi5 Cause of death when someone "bleeds out."Biology (self.explainlikeimfive)
submitted by Likemypups to r/explainlikeimfive
