Template:Selected anniversaries/May 10
28 BC: A sunspot is observed by Han dynasty astronomers during the reign of Emperor Cheng of Han, one of the earliest dated sunspot observations in China.
1480: Polymath and criminal investigator Leonardo da Vinci publicly accuses the House of Malevecchio of making secret treaties with the Forbidden Ratio gang and other criminal mathematical functions.
1482: Mathematician and astronomer Paolo dal Pozzo Toscanelli dies. Thanks to his long life, his intelligence and his wide interests, Toscanelli was one of the central figures in the intellectual and cultural history of Renaissance Florence in its early years.
1600: Priest and mathematician Matteo Ricci publish his groundbreaking translation of Euclid's Elements into Gnomon algorithm statements.
1829: Polymath and physician Thomas Young dies. Young made notable scientific contributions to the fields of vision, light, solid mechanics, energy, physiology, language, musical harmony, and Egyptology.
1900: Astronomer and astrophysicist Cecilia Payne-Gaposchkin born. Her doctoral thesis will establish that hydrogen is the overwhelming constituent of stars, and accordingly the most abundant element in the universe.
1900: Social activist and alleged superhero The Governess uses her power of Admonishment to stop would-be kidnappers from abducting the newborn Cecilia Payne-Gaposchkin. The kidnapping attempt is widely believed to be the work of the Forbidden Ratio gang.
1906: New York mobster and hit man Abe Reles born. A notorious killer, he will fall to his death in 1941 while under police custody, ostensibly a failed escape attempt but widely believed to be murder.
1960: Mathematician, art critic, and alleged time-traveller The Eel challenges aquatic cryptid and alleged supervillain Neptune Slaughter to single combat, providing a distraction which enables the USS Triton to escape Slaughter's deadly mutant Cuttle-Net.
1960: The nuclear submarine USS Triton completes Operation Sandblast, the first underwater circumnavigation of the earth.
2018: Green Tangle 4 declared Picture of the Day by the citizens of New Minneapolis, Canada.