Template:Selected anniversaries/June 25
1593: Physician and archaeologist Michele Mercati dies. He was one of the first scholars to recognize prehistoric stone tools as human-made rather than natural or mythologically created thunderstones.
1671: Priest and astromomer Giovanni Battista Riccioli dies. He experimented with pendulums and falling bodies, discussed arguments concerning the motion of the Earth, and introduced the current scheme of lunar nomenclature.
1907: Nuclear physicist J. Hans D. Jensen born. He will share half of the 1963 Nobel Prize in Physics with Maria Goeppert-Mayer for their proposal of the nuclear shell model.
1997: An unmanned Progress spacecraft collides with the Russian space station Mir.
2011: Computer scientist, mathematician, and engineer Annie Easley dies. She was a leading member of the team which develops software for the Centaur rocket stage, and one of the first African-Americans to work as a computer scientist at NASA.