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Metallic microlattice is the lightest metal structure ever created. It was developed by scientists at HRL Laboratories, jointly owned by Boeing and General Motors. While it's 99.99% air, its structure makes it strong and could be used in future planes and vehicles.

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69onZ TIL that the temperature profile of the Earth's atmosphere is stratified, fluctuating based on the particular atmospheric layer, with the highest temperatures observed in the exosphere, up to 2,000°C, due to solar radiation
LQdEZ TIL that the rap video "Lazy Sunday" produced by thelonelyisland way back in the day helped YouTube achieve national recognition as a video sharing site not meant just for video creators 👀
Z809a TIL that the song Africa by Toto has a sound installation that was set up in an undisclosed location in the Namib Desert to play the song on a constant loop. That installation is powered by solar batteries, allowing the song to be played indefinitely.
NX6Ke TIL the original story of "Frankenstein" was written by an 18 year old runaway and mother, Mary Godwin ("Shelley" after marriage) when her pregnant stepsister's boyfriend, Lord Byron, created a contest for his friends to write the best ghost story after a cold summer night talking of gruesome things
dLpQ TIL on June 29, 1995, a department store in Seoul, Korea collapsed, killing 500 people. During construction, the owner insisted on adding an unauthorized 6th floor with a swimming pool. When his engineers protested, they were fired.