The U.S. has a large military presence in Asia, and many security interests. How are its priorities changing?

The world's glaciers are shrinking at alarming rates, and many scientists believe it is due to changes in climate. Dr. Lonnie Thompson of Ohio State University and Dr. Douglas Hardy of UMass-Amherst discuss glaciers and how they...

This program examines the important figures of this period, their motivations for exploring new lands, and their tragedies and successes. This video looks at the voyages made by chinese men in the 15th century that were sent out by the...

A little known fact is that people of East Africa were building their own ships and took part in the medieval world's most extensive trade network.

This program examines the important figures of this period, their motivations for exploring new lands, and their tragedies and successes. This video looks at how the Portuguese tried to reach Asia via Africa. The Age Of Discovery Part 6

This program examines the important figures of this period, their motivations for exploring new lands, and their tragedies and successes. This video looks at the explorer Vasco da Gama's trade voyages, to India. The Age Of Discovery Part 10

Remnants of the Chinese Long March 5B rocket that was launched last month have crashed back down to Earth and into the Indian Ocean.

The physical and chemical characteristics of ocean waters are discussed including salinity, temperature, density, and pressure. Footage from Maine, the Canadian Maritimes, and the Pacific coast highlight dynamic characteristics of the...