› added 4 years ago

247

TIL we can’t see green stars (because of how black-body spectrum works)

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v9O7 TIL the Virgin Hotel in Chicago has no check-in desk; it uses a smartphone system in which you scan a QR code and retrieve your room key from a vending machine. The personal comfort assistant app named Lucy can order more pillows, control room temperature, and coordinate messages with hotel staff.
nemaG TIL during the Vietnam War, the U.S. carried out Operation Popeye, a "cloud-seeding" mission to stimulate clouds in Vietnam to increase rainfall and lengthen the monsoon season. After the operation was declassified in 1974, the United Nations banned the weaponization of weather.
4MYJ TIL The one thing that won’t kill you in Australia is rabies. The country is listed as “rabies free”.
BrRWr TIL timeless physics is the controversial view that time, as we perceive it, does not exist as anything other than an illusion. Arguably we have no evidence of the past other than our memory of it, and no evidence of the future other than our belief in it.
ADrx7 TIL about the unifying cube rule theory that claims to settle not only the "Is a hotdog a sandwich?" question, but many other similar food debates.