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TIL Adélie Penguins were observed to participate in rape, pedophilia, and necrophilia. The displays were so graphic, the scientist who originally saw them hid away the records of it for over 100 years.

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via reddit.com

xBDw TIL: 10% of Europeans are immune to HIV. This mutation occurred during the Black Death, which killed 75 million Europeans in the 1400s.
78L4L TIL that an estimated 100,000 people disappear annually in Japan due to Jōhatsu - vanishing overnight without a trace. It's usually due to depression, debt, addiction or the notoriously harsh work culture. There are even online companies and published guides to help one relocate their life.
oVVo TIL NASA will begin producing its own food in orbit for the first time ever – The lettuce will be grown under bright-pink LED lights, ready to harvest after just 28 days.
Voak TIL that Yahoo CEO Marissa Mayer circumvented her own rule disallowing employees to work from home by bringing her home to work–and building a nursery by her office.
Bn4d TIL that a particular species of beetle infiltrates ant colonies by mimicking the sounds that the queen makes, and then moves around the colony at will, preying on ants, and is “treated like royalty”, according to a study.