|
Visit our keyboard shortcuts docs for details
In this short film, see how plants and animals thrive here despite challenging conditions. |
Last updated: December 29, 2025
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.