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TIL In a rip current, death by drowning occurs when a person has limited water skills and panics, or when a swimmer persists in trying to swim to shore against a strong rip current, thus eventually becoming exhausted and unable to stay afloat. Usually swimmers can exit by swimming at a right angle

b6PW4 TIL that Xerox and Canon developed a digital watermark which color laser printers produce on every page that identifies the specific printer that was used to print the document in case it is used in a crime.
7Z8P TIL that Gary Leon Ridgway stood up in a Seattle court on 5 November, 2003 and admitted 48 counts of aggravated first degree murder, he officially became America’s most prolific serial killer.
6EGYW TIL the verb “eavesdrop” is a back-formation from the noun “eavesdropper”, which was formed from the unrelated noun eavesdrop (“the dripping of water from the eaves of a house”). An eavesdropper was someone who stands at the eavesdrop (i.e., next to the house) so as to hear what is said within.
b6vQ0 TIL that the term "Superhero" is jointly trademarked by both DC and Marvel, and any company wishing to use any variation of the term needs to get permission from both companies
5YGrP TIL of Alcibiades, an ancient greek general who'd served not one, not two, but three nations during the Peloponnesian War. After being exiled from Athens by his enemies, he played a pivotal role in their downfall whilst serving Sparta, and vice versa when he served Athens again until he got exiled.