1) On April 24, 1846, the United States declared war on Mexico, marking the beginning of the Mexican-American War. Texas played a significant role in this conflict, as it was the site of several major battles and served as a key staging ground for American troops.

2) On April 24, 1884, the town of Hearne, Texas was officially incorporated. Located in Robertson County, Hearne is known for its rich history in the railroad industry and its annual Watermelon Festival.

3) In 1915, the Texas Sheep and Goat Raisers' Association was founded on April 24. This organization represents the interests of farmers and ranchers across the state and promotes the growth of the sheep and goat industry in Texas.

4) On April 24, 1922, Texas-born aviator Katherine Stinson became the first woman to perform a loop-the-loop in an airplane. She achieved this feat in San Diego, California, and went on to set several other aviation records throughout her career.

5) April 24, 1970 marked the first ever Earth Day, a global event aimed at raising awareness about environmental issues and promoting conservation efforts. Texas played a significant role in the early days of the environmental movement, with organizations like the League of Women Voters and the Texas Association for Conservation rallying for greater protections for the state's natural resources.