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TIL Snow is an excellent insulator because it consists of about 90–95 percent trapped air (fresh). This is the reason why igloos are warmer inside than outside, and why some animals in colder regions build snow caves to spend the winter while hibernating.

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9oZQ TIL Louisiana is the prison capital of the world. Louisiana’s incarceration rate is nearly five times Iran’s, 13 times China’s, 20 times Germany’s and is the only US state with an annual average murder rate over twice the national average.
QRJp TIL: Leonard Cohen wrote more than 80 verses for Hallelujah before deciding which made the final cut for the song.
v1Xm8 TIL that a convicted murderer swore an affidavit that an innocent man was behind bars for a crime the murderer committed, and that affidavit sat in a safe for 26 years due to the sanctity of attorney-client privilege
Q0Oa TIL in 2010, a school board gave Macbooks to students, secretly spied on them, and punished them later at school.
Wadd TIL of the Demon Core, a spherical mass of plutonium that killed and injured several scientists during criticality experiments