› added 4 years ago

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TIL future Martian settlements will likely be set up inside Mars' large lava tubes. These tubes are effectively caverns with roofs tens of meters thick and with stable ambient temperature. They would protect human settlers and human technology from the extreme conditions that exist on the surface.

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y8nM TIL that there are other photos of the Tiananmen Square tank man, showing the true size of the forces he stood up to as well as others fleeing in the foreground as he approaches the tanks.
rR4E0 TIL of the Greenland shark, who can live up to 500 years, and only reaches reproductive maturity at 150 years old
Wkr1Y TIL that "dietary supplements" in the United States don't need to pass any safety inspections or testing. Manufacturers don't have to prove their products are safe, or even effective, and the FDA can only remove an unsafe product after someone gets sick, dies, or files an "adverse event" report.
VBKok TIL that daylight savings time has its own timezones and DST observing places must make a conversion for schedules notated in standard time in spring/summer of the same “zone”.
N7JK1 TIL that Dustin Hoffman was interested in playing Mario in the 1993 Super Mario Bros film, but was declined by Nintendo because they thought he didn't fit the role.