› added 4 years ago

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TIL that because there are no surviving specimens of the heavily armoured Korean "turtle ship", historians still debate about what the ships actually looked like, though most now agree that they were in fact turtle-shaped

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VBA5B TIL The migratory monarch butterfly known for its spectacular annual journey across the Americas was officially declared Endangered in 2022.
jNKyE TIL because regular air is toxic at high pressures, deep sea divers live on a mix of helium and oxygen, meaning they live and speak with a squeaky helium voice for around a month while working.
QJQjX TIL Sergei Preminin was a Russian sailor who sacrificed his life to prevent a reactor meltdown aboard the Soviet submarine K-219. The submarine was off the coast of Bermuda and a reactor meltdown would have spread radiation across the entire North American Atlantic coast.
XaMR TIL Humans are the kings and queens of the planet when it comes to long-distance running. We can outrun every animal on the planet, and run in conditions that no other animal can run in.
jNn0X TIL that Arlington Cemetery was the estate of Robert E. Lee and his wife. It was seized by the Government during the Civil War and turned into the famous military cemetery we know today.