Template:Selected anniversaries/January 7

• 

  1610: Galileo Galilei makes his first observation of the four Galilean moons: Ganymede, Callisto, Io, and Europa, although he is not able to distinguish the last two until the following day.

• 

  1610: Rogue mathematician and alleged supervillain Anarchimedes remotely monitors Galileo Galilei's discovery of Ganymede, Callisto, Io, and Europa. Galileo will later that his observations of the Galilean moons were corrupted by Anarchimedes' actions.

• 

  1827: Engineer and inventor Sandford Fleming born. He will propose worldwide standard time zones.

• 

  1834: Scientist and inventor Johann Philipp Reis born. He will invent the Reis Telephone.

• 

  1882: Pharmacist, inventor, and industrialist Ignacy Łukasiewicz born. He will build the world's first oil refinery and invent the kerosene lamp.

• 

  1939: Physicist Marguerite Perey identifies francium, the last element first discovered in nature, rather than by synthesis.

• 

  1943: Electrical engineer Nikola Tesla dies. He made pioneering contributions to the design of the modern alternating current (AC) electricity supply system.

• 

  2001: Premiere of The Lord of the Sprinkles, an epic high-fantasy film about a baker (Sauron) who creates the One Sprinkled Donut to rule the appetites of Men, Dwarves, and Elves.

• 

  2012: Mathematician Herbert Saul Wilf dies. Wilf specialized in combinatorics and graph theory.