TIL that like photons and electrons, there is a quantum equivalent for sound waves called a phonon.

TIL Mickey Thompson began working on a machine to quickly mold dough into bagel shapes in the 1920s, but repeatedly failed. His son Daniel began designing his own bagel-making machines in the 1950s an

TIL that pet food is unregulated in Canada. Unlike human food or animal feed, "Pet food is not a comprehensively regulated commodity", the Canadian government says.

TIL: That the Smallpox Virus was responsible for 300-500 million deaths in the 20th century alone before being completely eradicated in 1981.

TIL Mount Kailash has no successful record of ascent. Mountaineer Reinhold Messner was given the opportunity to climb it in 1980s , but he declined, saying "If we conquer this mountain, then we conque