July 21st: National & International Days, Celebrations and Observances

Want to help your community on July 21st?

• Your local zoo staff work hard. Drop by to meet the keepers - they spend their days caring for everything from injured owls to endangered tigers.
• Know someone interested in chess? Teach them basic moves. You'll see their eyes light up at their first successful strategy.
• Head to nearby woods with snacks and water. Regular visitors keep these places alive. The more people walk these paths, the better chance they'll stay protected.
• Our neighborhood youth programs need volunteers. Even an hour helps local kids grow. Most wildlife sanctuaries run tight budgets - pick an animal to support at yours.
• Check your grocery receipts. Smart food picks save cash, and that extra money could protect local forests. Snap photos on your next nature walk. Share them. More people might explore these spots themselves.
• Take those chess games outside. The shade of old trees beats sitting indoors. Simple actions today make next year better.

July 21st marks several breakthroughs in science and engineering.

• At Antarctica's Vostok Station, researchers documented the most extreme cold ever measured. Their 1983 readings showed -89.2°C (-128.6°F) at their remote base, 11,444 feet above sea level. Weather scientists still analyze data from this isolated outpost to better grasp global climate patterns.
• The Aswan High Dam changed life along the Nile when Egypt finished construction in 1970. Its concrete barrier stretches 12,562 feet across the river. Hydroelectric output now powers a tenth of Egyptian households, while Lake Nasser's waters have reshaped the region's weather and wildlife habitats.
• In a different kind of milestone, Erden Eruç circled the Earth under his own power in 2012. He spent 1,026 days crossing oceans by rowboat, traversing continents by bicycle, and covering difficult terrain on foot. His 41,196-mile route proved what determined individuals can achieve without engines or fuel.

July 21st connects an unlikely group of pioneers in science and public service. At Carleton College, Paul Wellstone taught political science before Minnesota voters sent him to the Senate. He battled to save the Arctic Wildlife Refuge through 2002, when a plane crash cut his work short. His organizing tactics still echo through Re:Power's training sessions.

In what many consider a defining moment for chemistry, Rudolph Marcus figured out electron behavior in the 1960s. Scientists now apply his calculations to improve solar technology and study how plants convert sunlight to energy.

Former nurse Cori Bush walked an unusual path to Congress, representing Missouri after seeing pollution's effects in urban neighborhoods. She probably knows more about toxic waste and water quality than most representatives - and it shows in her environmental bills.

Reading Hemingway means finding nature on every page. Sure, "The Sun Also Rises" built his fame, but in "The Old Man and the Sea," salt spray practically hits your face. His "Green Hills of Africa" pulled readers onto the savanna, helping fuel early conservation efforts.

Sophie Bledsoe Aberle spent countless seasons studying Native American agriculture. Her notebooks detail the sustainable farming wisdom of Pueblo communities - methods refined across generations. Agricultural scientists still reference her work when tackling modern growing challenges.