-
Latest Blog Posts
25
AugUnited States National Park Service Birthday!
On August 25, 1916, the United States National Park Service was created by Congress through the National Park Service Organic Act to care for all national parks, historic battlefields, and monuments throughout the country. More than 400 National Parks … Continue reading →
24
AugPliny’s Play-by-Play
On August 24, 79, the first recorded explosion of Mount Vesuvius, Italy, was witnessed by the 18-year-old nephew of the Commander of the Roman Fleet. His uncle sailed with ships to rescue survivors, leaving the teen to observe the … Continue reading →
Tag Archives: groundwater
The GRACE Twins
On March 17, 2002, NASA launched the GRACE twins, two Gravity Recovery and Climate Experiment satellites. They flew about 220 km ( 137 mi ) apart in a polar orbit at 485 km (300 mi) above Earth, measuring regional … Continue reading
Posted in On This Day
Tagged Earth gravity fields, freshwater measurement, GRACE, groundwater, March 17, On This Day, The Roberta Bondar Foundation
Comments Off on The GRACE Twins