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TIL that the gas cells of early zeppelins were made from cow intestines. It took two hundred and fifty thousand cows to make one airship. During WW1, Germany and its allies ceased production of sausages so that there would be enough cow guts to make zeppelins.

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d89ZQ TIL that even though only 10% of the mass of a galaxy cluster is due to conventional matter, only 1% is due to stars and galaxies themselves. The majority of the visible matter in a cluster is a sparse plasma.
b9654 TIL Nearly 8% of the human genome is virus DNA. Meaning some of our ancestors survived a virus but still carry the DNA it inserted.
16K1D TIL Timbaland let OneRepublic's Ryan Tedder keep 100% of the publishing for the remix of the song "Apologize". His manager told Tedder, "He’s not trying to take food off your table. He produced the remix. You wrote the song." Tedder said this decision changed his life by allowing him to buy a home.
N79n6 TIL the US provided Laos with funds and concrete to expand an airport which could serve as a base for US fighter jets during the Vietnam War. But as the funds and concrete arrived before any contract was signed, Laos decided instead to build a memorial to soldiers who died in World War II.
R55kl TIL that in the 1920s, canned turtle soup was considered a delicacy in England and turtle riding was a major draw card in the 50s