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TIL Eddie Van Halen recorded the 1995 piece "Strung Out" back in 1984 on a piano filled with things like ping-pong balls, batteries, knives, forks. Producer Bruce Fairbairn picked out 90 seconds of a 10-hour tape recording that started with Eddie creating harmonics directly in the piano's strings.

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pYwde TIL that 96.7% of people aged 16-24 in the Philippines play video games, which is the highest percentage of any country in the world
1ax4V TIL:There are bugs which are specific to particular foods stored by humans. For example the Biscuit Beetle.
grXeW TIL that the black martin fish (the worlds fastest sea animal) can swim just as fast in water as the cheetah runs on land
yQZEJ TIL that there are only 88 recognized constellations and it has been that way since 1928.
jN6KR You probably know that your visual perception of the world is a bit different than your pets’. Dogs see things with less color than humans, snakes can see infrared, and if you have a pet bull, it lives in a world where red and green are the same color. This brings up a good question. Why do you have a pet bull? You should get a cat instead, and when you do, it is important to know that your new friend can’t focus on objects farther than 20 feet away. The point is, animals have evolved to see in a variety of ways. But how can we see things through their eyes? Marine biologist and National Geographic Emerging Explorer David Gruber collaborated with a research team to develop lights and camera filters that allowed him to do just that, underwater. Through their work, the team discovered biofluorescence in an abundance of aquatic species. This “glowing” trait has to do with how an organism absorbs and emits light. Research has indicated that this radiance is possibly used for communication and camouflage. One caveat: You need a certain species of eyes (or David’s camera) to see it. Swell sharks (Cephaloscyllium ventriosum) have fluorescent proteins inside their skin, which are triggered by the ocean’s blue light, becoming visible to other swell sharks. David’s camera has special yellow filters that allow the simulation of a swell shark’s vision. It turns out there is a massive rave going on 500 meters below the ocean’s surface, and one of the glowing guests is a type of cat shark!