May 28, 1892: The Sierra Club is founded in San Francisco with 182 charter members. John Muir is elected president, and he leads the effort to preserve the Hetch Hetchy Valley and the Yosemite area of central California.
May 28, 1990: The Mexican government enacts a total ban on the killing of the endangered Kemp's Ridley sea turtle (at right). The turtles have made a mild recovery from near-extinction, but threats — including the 2010 Gulf oil spill — remain.
May 28, 1998: Pakistan joins the nuclear weapons club, exploding its first nuclear weapon in a test in the Chagal Hills near the Afghan border in the Southwest part of the country.
May 28, 2004: In a thoroughly implausible climate-change scenario, a feature film called "The Day After Tomorrow" is released. Over the course of 48 hours, North America is plunged into Arctic conditions. Dennis Quaid, who plays a dashing climate scientist, can't get a taxi in Manhattan because they're all under 70 feet of ice. His son, played by Jake Gyllenhaal, still manages to get the girl in the face of global catastrophe.
May 28, 2007: The Museum of Creation opens in Petersburg, Ky. The 70,000-square-foot facility features Disney-grade animatronic figures from the Bible and makes the case that the dinosaurs were created by God 6,000 years ago. Scientists and education groups protest the museum's premise, citing the accepted norms of biology, chemistry and physics.