Wednesday, September 10, 2025

Friday, September 5, 2025

Outer Space


Concept for a space-based solar power system to beam energy down to Earth

Thursday, September 4, 2025

Outer Space


Illustration of Earth's atmosphere gradual transition into outer space

Wednesday, September 3, 2025

Universe


The Hubble Ultra-Deep Field image shows some of the most remote galaxies visible to present technology (diagonal is ~1/10 apparent Moon diameter)

Sunday, August 31, 2025

Saturday, August 30, 2025

Animals


Short-tailed albatross (Phoebastria albatrus)
Captured at Midway Atoll

Tuesday, August 26, 2025

Afghanistan


Tents of Afghan nomads in the northern Badghis Province. Early peasant farming villages came into existence about 7,000 years ago.

Sunday, August 24, 2025

Science


The Plimpton 322 tablet by the Babylonians records Pythagorean triples, written c. 1800 BCE

Saturday, August 16, 2025

Thursday, August 14, 2025

Monday, August 4, 2025

Southern Ocean


Area inside the black line indicates the area constituting the Pacific Ocean prior to 2002; darker blue areas are its informal current borders following the recreation of the Southern Ocean and the reinclusion of marginal seas.

Thursday, July 31, 2025

Pacific Ocean


Made in 1529, the Diogo Ribeiro map was the first to show the Pacific at about its proper size

Tuesday, July 29, 2025

Atlantic Ocean


In the subpolar gyre of the North Atlantic warm subtropical waters are transformed into colder subpolar and polar waters. In the Labrador Sea this water flows back to the subtropical gyre.

Sunday, July 27, 2025

Arctic Ocean


The Arctic Ocean, with borders as delineated by the International Hydrographic Organization (IHO), including Hudson Bay (some of which is south of 57°N latitude, off the map) and all other marginal seas.

Wednesday, July 23, 2025