Columbia Encyclopedia

(Encyclopedia) Deep Sea Drilling Project, U.S. program designed to investigate the evolution of ocean basins by core drilling of ocean sediments and underlying oceanic crust. Funded by the National Science Foundatio...

(Encyclopedia)  CE5 Pacific Ocean, largest and deepest ocean, c.70,000,000 sq mi (181,300,000 sq km), occupying about one third of the earth's surface; named by the explorer Ferdinand Magellan; the southern part i...

(Encyclopedia)  CE5 Atlantic Ocean [Lat.,=of Atlas], second largest ocean (c.31,800,000 sq mi/82,362,000 sq km; c.36,000,000 sq mi/93,240,000 sq km with marginal seas). The North Atlantic Ocean has some of the w...

(Encyclopedia) space medicine, study of the medical and biological effects of space travel on living organisms. The principal aim is to discover how well and for how long humans can withstand the extreme conditions ...

(Encyclopedia) ocean, interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major units that are separated from each other i...

(Encyclopedia)  CE5 Uganda yo͞ogänˈdə, o͞ogänˈdä [key], officially Republic of Uganda, republic (2015 est. pop. 37,102,000), 91,133 sq mi (236,036 sq km), E central Africa. It borders on Tanzania and Rwand...

(Encyclopedia)  CE5 Niger nīˈjər, nēzhârˈ [key], officially Republic of Niger, republic (2015 est. pop. 18,045,729), 489,189 sq mi (1,267,000 sq km), W Africa. It borders on Burkina Faso and Mali in the west...

(Encyclopedia)  CE5 Mauritania môrĭtāˈnēə [key], officially Islamic Republic of Mauritania, republic (2015 est. pop. 4,182,000), 397,953 sq mi (1,030,700 sq km), NW Africa. It borders on the Atlantic Ocean i...

(Encyclopedia)  CE5 Moon mission assembly CE5 Stages in a moon mission shown counterclockwise from launching on the first day to splashdown on the ninth day. space exploration, the investigation of physical co...

(Encyclopedia)  CE5 CE5 Canada kănˈədə [key], independent nation (2020 est. pop. 37,742,154), 3,851,787 sq mi ...