The Africa Program achieves its mission through in-depth research that offers practical solutions to key challenges in US-Africa relations. The Africa Program's flagship initiatives include the ...

Metabolism tests look at a person’s hormone levels or carbon dioxide and oxygen output. They may indicate a hormone imbalance or help people with weight goals. Several companies offer metabolic tests ...

Edited by David M. Karl, University of Hawaii, Honolulu, HI, and approved November 2, 2017 (received for review September 5, 2017) ...

I often look at cases where things are falling. We typically call this "free fall" motion because the object is moving only under the influence of the gravitational force. With only the gravitational ...