The United States launches an invasion of Puerto Rico during the Spanish-American War. Over 1,300 U.S. troops landed at Guánica, beginning a military occupation that would lead to Puerto Rico becoming a U.S. territory.
British chemist and X-ray crystallographer whose work was central to the understanding of the molecular structures of DNA, RNA, viruses, coal, and graphite. Her X-ray diffraction images of DNA were critical to the discovery of the DNA double helix.
Louise Brown, the world's first baby conceived via in-vitro fertilization (IVF), is born in Oldham, England. The successful birth revolutionized reproductive medicine and offered new hope to infertile couples.