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TIL Jupiter's moon Ganymede is the largest moon in the solar system and is larger than the planet Mercury or dwarf planet Pluto.

Read more science.nasa.gov

via reddit.com

OrAL TIL that the New Horizons space probe that passed Pluto in 2015 had an ounce of Clyde Tombaugh’s ashes, the man that discovered Pluto
N70wP TIL that researchers at UC Santa Barbara, intending to show how statistics can be used misleadingly, received statistically significant results when scanning a salmon with fMRI to show that it's brain responded differently to photos of different social situations. The salmon was dead.
D1xYD TIL German chocolate cake is named after a guy named Sam German, not the country.
wK4o TIL despite sharing the same oral language, British, Irish, Australian and American sign language are all completely different languages.
XmXQ TIL Augustin Mouchot, a French math teacher, was a 19th-century inventor of the earliest solar-powered engine. It converted solar energy into mechanical steam power. In 1878 he showcased his solar-powered concentrator at the Exposition Universelle in Paris & took home the gold medal from the fair.