September 12th: National & International Days, Celebrations and Observances

Here's what's happening on September 12.

• Text three people who could use a lift - it's the National Day of Encouragement after all.
• Grab some fresh air between tasks. Five minutes outside works wonders.
• That IT person who saved your data last week? Drop them a note.

Women in law enforcement keep our neighborhoods safe. Each officer has a unique story worth knowing.

Tired of tossing plastic cups? Pick a reusable favorite and stick with it.

Those South-South Cooperation projects? They're changing how countries tackle environmental challenges. Some video games now explore these themes too - mixing fun with real-world issues.

Screens strain eyes and minds. Brief breaks help. Get up, stretch, move around. Your work will still be there when you get back.

Scientific advances mark every September. These four dates altered our understanding of the natural world.

• Hudson's small ship changed American waters in 1609. The Halve Maen, barely 85 feet long, pushed north into what became the Hudson River. Time has proven the worth of this discovery - the 315-mile stretch now sustains over 200 fish species in its varied ecosystems.
• Leo Szilárd's morning walk through London transformed physics. On Southampton Row in 1933, his thoughts crystallized into the fundamental principles of nuclear chain reactions. His street-corner calculations opened new paths in atomic research.
• A group of French teenagers followed their dog into a cave in 1940. Their simple afternoon exploration uncovered the historic Lascaux site. The limestone walls held 2,000 prehistoric works, with 900 animals drawn in exacting detail. These ancient artists left precise records of Ice Age fauna.
• The UARS mission tracked Earth's atmospheric changes starting in 1991. From its 575-kilometer orbit, the satellite's instruments measured ozone fluctuations for 14 years. Its data expanded scientists' grasp of atmospheric chemistry and air quality patterns.

September 12th links an unlikely group of world-changers.

• In her Paris lab, Irène Joliot-Curie went beyond standard physics. She and her husband discovered how to make elements radioactive - work that earned them a Nobel Prize. At the Sorbonne, she became one of the first scientists to raise alarms about radiation's environmental toll.
• Jesse Owens turned the 1936 Berlin Olympics upside down. He walked away with four gold medals, smashing records while Hitler watched. By 1976, his medal case included the Presidential Medal of Freedom - a nod to both his athletic skill and his stand against racism.
• These days, Jan Egeland tackles refugee crises differently. After leaving his UN post, he took charge at the Norwegian Refugee Council. His focus? Getting help to communities hit hardest by weather disasters and conflict.
• Nellie Wong puts workers' struggles into powerful words. Her poetry, like "Dreams in Harrison Railroad Park," grew from her work with Radical Women and the Freedom Socialist Party. Each line pushes for better jobs and equal treatment.
• Photographer Nan Goldin took on the art world's power players. After winning Venice's Golden Lion, she built P.A.I.N. into a force that successfully pushed the Sackler name off museum walls.