Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The minimum energy costs of transport for a variety of swimmers, fliers, and runners as well as some man-made devices and different forms of human locomotion. [Reproduced from ref. 9 with permission. (Copyright 1975. Reprinted with permission from American Scientist.)]
