TIL that English is not the official language of the United States since it doesn’t have one, but it’s the most widely used. Some of the most widely spoken languages other than English are Spanish, Chinese, Tagalog, Vietnamese, and Arabic. [source, comments]

TIL that the last 'human zoo' was opened in 1994 in France. Twenty-five Ivorians, including children, had their passports confiscated and were kept for six months without pay. During that time, they were forced to work bare-chested, sleep in huts, and were treated only by veterinarians. [source, comments]