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TIL that Elephants are one of the only other creatures with a nervous system advanced enough to allow them to feel empathy. They are also one of the only creatures to suffer from Post Traumatic Stress Disorder

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6NyJ TIL Freddie Mercury had a girlfriend, Mary Austin, for six years before he decided he preferred male partners. In his will he left her his mansion and the bulk of his multi-million pound fortune.
WkrZL TIL plague doctors wore masks that looked like bird beaks because the beaks stored very aromatic plants that protected them from putrid odors
OogQ4 TIL that medical errors are the third leading cause of death in the US after heart disease and cancer
dD8lQ TIL Bees come in colors other than yellow! There are green, blue, and gray varieties that also exist, such as the Green Orchid bee, the Blue Calamintha bee, and the Ashy Mining bee.
85mG TIL Killer Whales are the apex predator of the sea. They can kill any other sea creature, including the Great White Shark, with a technique of flipping the shark upside down until it suffocates. Killer whales have minds of their own, high intelligence, and have no competition in the sea.