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TIL some American airports now allow non-ticketed passagers to pass through security

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via reddit.com

BrK7y TIL that umami is one of the five basic flavors along with sweet, salty, sour and bitter. It's that flavor that makes you say yum for the protein you're ingesting.
epRAL TIL that Sharks are older than Trees - Sharks have been around for at least 400 million years and have survived all five global mass extinctions. Fossil evidence shows that the earliest sharks evolved around 450 million years ago. By comparison, trees appeared just 360 million years ago.
VBAl4 TIL that in 2019, 3 people who had accused actor Kevin Spacey of sexual misconduct died by suicide, a traffic accident, and an undisclosed cause of death (Reposted to fit rules, no opinions or editorializing)
El8W TIL That JRR Tolkien had such a fascination with finland and its kalevala (an old book of poetry and songs) that he based his elvish language off of finnish principles and grammar, as well as wrote his most famous works after the kalevala’s influence on him.
OGbB7 TIL about immune amnesia: One of the most unique—and most dangerous—features of measles pathogenesis is its ability to reset the immune systems of infected patients.