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TIL that the Hoover Dam contains enough concrete to build a two-lane road from San Francisco to New York.

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KYdD9 TIL that when it's really cold, Chicago sets its railroad tracks on fire to ensure that trains will be able to run properly and get to their destinations on time
4Xpk5 TIL Your pup can pick up on subtle changes in your scent, which can help him figure out how you are feeling — such as by smelling your perspiration when you become nervous or fearful. It’s also likely how dogs can detect certain diseases or know that a household member is pregnantIn
5VJlp TIL Potatoes were only introduced into Europe in the late 16th century, and are believed to have originated in the Andes region of South America, which includes parts of present-day Peru and Bolivia.
jNPQQ TIL "Finding Nemo" is the second film to be dubbed in Navajo, following the success of Navajo "Star Wars Episode IV: A New Hope". It was a joint effort between the Navajo Nation Museum and The Walt Disney Studios for more than a year
v1MBK TIL the beaked masks used during the Bubonic Plague were often filled with flowers and herbs because putrid smells were thought to transmit diseases.