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TIL that the anechoic chambers are the quietest places on Earth and have background noises measured in negative decibels. After a few minutes in chambers, you can hear your heartbeat and blood circulating in your ears and could experience troubles with orienting or even standing.

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4XwLo TIL William "Billy" Mitchell was an US army general who was an outspoken proponent of air power and its ability to defeat battleships. Due to his unrelenting criticism of high command's refusal to adapt, he was demoted and court martialed. Today he is regarded as the father of the US Air Force.
oBdn8 TIL California's vehicle emission laws are stricter than those of the EPA. Cars made for sale in the US are made with those standards in mind so they can be sold all over. Often, the EPA adopts California's standards a few years after the state institutes them.
4X4aN TIL Holding in your Fart can actually cause Bad Breath.When gas hangs out too long in your intestine, it begins to reabsorb into your bloodstream. It is then carried through your body up to your lungs where it is processed out and leaves when you exhale!
akbN TIL that Venezuela is one of the most violent places on earth with a person being murdered every 21 minutes.
W7QZ8 TIL of storm chasers, people that actively search out storms and extreme weather to conduct meteorological research on the field, to report tornados, storms, hurricanes and other high-impact weather conditions to weather bureaus.