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TIL that Pilot FriXion ink is thermo-sensitive, and leave a notebook or homework near heaters or in a car on a hot day can make the ink invisible. To make the text reappear, you can simply put it in a freezer for a short period of time, the ink should reappear at around -10C/14F

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VBK9Q TIL an earthquake light is a luminous aerial phenomenon that appears in the sky at or near areas of tectonic stress.
4OOX TIL Roman philosopher Lucius Annaeus Seneca was sentenced to suicide by Roman emperor Nero. Due to his old age and diet he failed to bleed to death after severing his veins. He then, to no avail, attempted to consume poison. Finally, he suffocated during a steam bath meant to quicken blood loss.
rRMPW TIL that Safety Beach near Melbourne, Australia was previously called Shark Bay due to the presence of many sharks . The name was changed in an attempt to attract tourists the area as they had previously feared swimming in a place called "Shark Bay".
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