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.
Time lapse video of Angela Tan working in the USGS Sediment Lab Suite and Carbon Analysis Laboratory at the Pacific Coastal and Marine Science Center in Santa Cruz, California.
Public Domain.