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Each October, reddish balls said to be the size of basketballs rise from the Mekong River. Thousands gather to watch.

iPTF14hls was supposed to dim in 100 days. Instead it exploded five more times over 1,000 days. Archival photos show it also exploded in 1954. No theory fully explains it.

In 1985, Mariko Aoki wrote to a Japanese magazine about her bookstore bathroom problem. The magazine got so many responses that they named the phenomenon after her.

On June 18, 1983, Sally Ride became the first American woman in space. 43 years later, her name still rules.

A University of Zaragoza study scanned 100 young adults and found authoritarians have reduced grey matter in regions for empathy and social reasoning.

On August 21, 1986, Lake Nyos in Cameroon released up to 300,000 tons of CO2. The cloud killed 1,746 people and 3,500 livestock in four villages within 25 km.

In colorful, funny, and appealing comics, Perrin Roosevelt Ireland's new book Poking the Squid describes the incredible, diverse array of sexual behaviors and anatomies in the animal kingdom.

The Vatican Observatory has operated since 1774. Four nuns cataloged nearly half a million stars for it in the early 20th century. Today it runs a telescope in Arizona.