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.
Close (and hot!) view of lava. Note stretched and torn slivers of crust, small bubbles, and sagging lines that eventually developed into wrinkled crust. Width of view, 40 centimeters.
Public Domain.
