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TIL that the first Submarine was used in the Revolutionary War and was called “The Turtle”.

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Gdk4 TIL that Christmas trees can be recycled. Louisiana uses them to build shoreline fences to reduce erosion and form new marshes.
P6eJ TIL snake venom contains proteins that change the odor of the wounded animal, allowing snakes to track their bitten prey by odor. This adaptation allowed rattlesnakes to evolve the strike-and-release bite mechanism, which provided a huge benefit by minimizing contact with potentially dangerous prey.
pYrMp TIL that the skinny rock pillars seen in Bryce Canyon National Park are called "hoodoos." They typically form in arid badlands with sporadic, heavy rainfall, where erosion and weathering rates all have an impact on their ability to form.
7r5QO TIL that Harbor Freight Pittsburg clamps can be reversed to spread things instead of just clamping...
PYvNG TIL that deer antlers are pretty much bone cancer. '"Deer antlers [are] using essentially a controlled form of bone cancer growth," says Edward Davis[...]. The involvement of the tumor-promoting genes isn't surprising, he says; what is surprising is the involvement of the cancer-controlling genes.'