1. On April 24, 1981, the University of Wyoming's Geological Museum was destroyed in a fire. The museum housed one of the largest and most valuable collections of dinosaur fossils in the world, including the remains of the Triceratops, Stegosaurus, and Allosaurus.

2. On April 24, 2007, Wyoming Governor Dave Freudenthal signed a bill legalizing the use of lethal injection as a method of execution for condemned prisoners. Wyoming had previously used the gas chamber for executions, but it was found to be inhumane.

3. On April 24, 1944, the US Army Air Forces' 402nd Fighter Squadron was activated at Casper Army Airfield. The squadron flew P-51 Mustangs and participated in combat missions during World War II.

4. On April 24, 1878, the Wyoming Stock Growers Association was founded in Cheyenne. The organization was formed to address the growing problem of cattle rustling and to promote the interests of Wyoming's cattle industry.

5. On April 24, 1898, the town of Sundance was incorporated. Sundance is best known for being the location of the Sundance Kid's escape from jail in 1897, as well as the site of the Sundance Kid's trial and conviction for the murder of a Wyoming rancher.