On October 14, 1994, Saguaro was redesignated a National Park from a National Monument. This Arizona park covers elevation ranges from desert floor to mountain top, up to 2600 m (8600 ft). The park’s lowest elevation is a desert ecozone with chaparral and grassland…
On October 5, 1911, botanist, educator, and ecologist Pierre Mackay Dansereau, CC GOQ FRSC, was born in Montréal. A working botanist-theorist, he developed defining insights into ecology through a lifetime of field research from the Alps to the Arctic and teaching at 20 universities…
On September 25, 1890, Sequoia National Park was established to protect a forest of giant trees called sequoias. That’s what to do with the largest trees on Earth – build a national park around them! The largest tree is named the General Sherman tree…
On September 22, 1877, American zoologist Victor Ernest Shelford was born. He studied animal communities and correlations between changes in environment and the changes in animal populations. Looking at rivers, lakes, and forests in his first book, Animal Communities in Temperate America, Shelford outlined…
On September 18, 2023, the Slumgullion Earthflow continues moving downhill from Mesa Seco… a slow, thousand-year-old journey! Produced in tectonic activity, the San Juan Mountains formed tens of millions of years ago in southwest Colorado. As climate altered the volcanic residue in the Mesa…
On September 16, 1921, physicist and metallurgist Ursula Franklin was born in Munich, Germany. Franklin’s view of her world formed as she grew from a young woman who suffered wartime workcamp imprisonment, through a doctorate in experimental physics, to emigration to a renewed life…
On September 14, 1907, Jasper Forest Park was established, expanding into national park status in 1930. With its 11,000 km² (4200 mi² ) area, Jasper National Park of Canada is larger than the country of Jamaica. On hundreds of individual sites throughout Jasper, there…
On September 12, 1940, close to the town of Lascaux, four teenaged boys enlarged the entrance to an old river cliff cave so they could explore. They found it to be so large and complex … they got their teacher involved and… anthropologist Henri…
On September 11, 1847, American astronomer Mary Watson Whitney was born. She excelled in mathematics and nature studies. Whitney was one of Vassar’s first students in the college’s opening year and one of its first students in its new department of astronomy. In a…
On September 7, 1914, American space scientist James Alfred Van Allen was born. In the International Geophysical Year [July 1, 1957 to December 31, 1958] Van Allen reconfigured the radiation detectors he had designed for one rocket system to fly on a different system…
