› added 4 years ago

224

High-speed video imaging colored to reveal the two main components of a sneeze show a shower of larger droplets, green, whose trajectories can extend up to two meters from the person sneezing, yellow, and a cloud, red, made of a mixture of smaller droplets suspended in moist, warm gas. Pathogen-bearing droplets can be suspended in the air for not just seconds, but minutes, and can travel up to 27 feet.

Read more nationalgeographic.com

7RrL TIL That most people in Cuba still drive old American cars from the 1950’s. There are about 60,000 classic American cars in Cuba today and if the embargo were to be lifted, the Cuban people could make a fortune off of these “Yank Tanks”
aw4kb TIL bats and dolphins evolved echolocation in the same way (down to the molécular level). An analysis revealed that 200 genes had independently changed in the same ways. This is an extreme example of convergent evolution.
Me94a TIL eye movements predict aspects of our personality. Studies utilizing machines which encode different eye movements reliably predict four of the Big Five personality traits (neuroticism, extraversion, agreeableness, conscientiousness) as well as perceptual curiosity only from eye movements.
Ob8X TIL scientists have found that Ozzy Osbourne has unique genetic mutations that that increase his body’s endurance for hard drugs and excessive alcohol: the “genes connected to addiction, alcoholism … all had unique variations in Osbourne, a few of which geneticists had never seen before”
Z8YQa TIL about a species of human that grew no larger than a modern 3-year-old child and lived on a remote island in Indonesia 18,000 years ago. These humans lived alongside Homo sapiens. They manufactured sophisticated stone tools, hunted elephants, and more, all with a brain only 1/3 the size of ours.