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TIL that giraffes never sleep for more than a few minutes at a time to avoid being woken up by a lion eating it alive

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4XEmo TIL that sustaining a second concussion before fully recovering from an initial one (even an extremely minor one) can cause a condition called Second Impact Syndrome, which causes severe brain damage 100% of the time and frequently results in death.
dX98 TIL a new prototype engine will allow travel from London to Australia in 4 hours.
7rkOb TIL the One World Trade Center in New York is 1776 feet tall to symbolize the founding of the USA.
W7ggL TIL at the height of the 80's rise of the Japanese economy, the land value of the Imperial Palace in Tokyo was worth as much as the entire state of California and the Japanese property market was worth as much as 4 times that of the US.
X0gP8 TIL the current fastest Wifi band (6GHz) already transmits, but most people can't access it. As of 2023, tech giants such as Apple only have 2 phones that support it.