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TIL that the Milky Way galaxy is located in a comparatively empty region of space known as the KBC Void. At approximately 2 billion light-years in diameter it is the largest known void in the universe

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J1BdQ TIL that an F-117 Nighthawk crashed in Sequoia National Forest in 1986, two years before the plane was publicly announced. The US Air Force established a permitter around the crash site and secretly replaced the wreckage with a wrecked F-101A that had been stored in Area 51 for this purpose.
4XAo6 TIL Werner Forssmann, a physician, risked his own life to show that cardiac catheterization could work. He cut a hole in his arm and inserted a catheter into a vein, not knowing if the catheter might pierce a vein. He was later awarded the Nobel Prize in Medicine.
ADBjd TIL "The Ganges is the final resting place for about forty thousand cremated bodies every year. So, people who swim in Ganges river are like swimming in a sort of sludge made partially out of dead people."
rvVW TIL that scientists using high-resolution satellite images, drone photos, and ground surveys, have discovered a hidden monument in the center of Petra
PW5V TIL Horseshoe crabs have saved more human lives than all other animals put together