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TIL carpentry levels are also known as whiskey sticks. When the bubble level was first invented they used water, which would freeze in cold weather. People started using a mixture of whiskey and water as antifreeze in their levels.

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p8yGG TIL there's a debate about whether math was invented or discovered. Even though math is used to measure and predict and model, it's debated whether math is inherent to the universe or if math is just something we came up with to describe/measure/predict natural phenomenon.
woXAE TIL that a rat's jaws are built like an alligator's, and they can exert up to 7,000 pounds of force per square inch, meaning they can quickly bite down to the human bone.
eGen TIL the US imports 11% of its oil from Saudi Arabia and 38% of its oil from Canada
6WVX TIL that China kidnapped a 6 year old boy after he was named second highest Tibetan Lama. His whereabouts are still unknown
NnYb TIL of Martin Pistorious, a man who fell into a coma as a young boy. 2 years into his 12 year vegetative state his conscience was awakened. He was trapped for 10 years in his body, unable to communicate, with only his thoughts for company.