Salt Pans in Moray, Peru

Salts Pans in Moray, PerúSince pre-Inca times, salt has been obtained in Maras by evaporating salty water from a local subterranean stream. The highly salty water emerges at a spring, a natural outlet of the underground stream. The flow is directed into an intricate system of tiny channels constructed so that the water runs gradually down onto the several hundred ancient terraced ponds. Almost all the ponds are less than four meters square in area, and none exceeds thirty centimeters in depth. All are necessarily shaped into polygons with the flow of water carefully controlled and monitored by the workers. Continue reading

Antarctica as Seen From Space

This Image Really Puts the Size of Antarctica Into Perspective

Antarctica as seen from spaceAntarctica is Earth’s southernmost continent and is surrounded by the Southern Ocean. At 14.0 million km2 (5.4 million sq mi), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. About 98% of Antarctica is covered by ice that averages at least 1 mile (1.6 km) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula. Continue reading