Skip to main content
U.S. flag

An official website of the United States government

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.

News and Updates

Displaying 51 - 75 of 154

Harmful Algal Blooms in Their True Colors

Explosive growth of cyanobacteria, also called blue-green algae, is nothing new. In fact, such cyanobacteria probably produced the original oxygen in Earth's

SF6 Shows Promise as Mercury Substitute

Elemental mercury – which is being phased out of commercial thermometers worldwide due to safety concerns – may also be replaced as a temperature reference

Better Accuracy Out of Thin (or Thick) Air

NIST scientists have devised and improved a prototype instrument the size of a loaf of bread that can substantially increase the accuracy of length measurements

HID Lamps: Getting Brighter Faster

NIST has been issued a patent for a novel method to improve the performance and utility of the sort of high-intensity discharge (HID) lamps used for stadium and

Measuring Smokestack Emissions Accurately

Society is increasingly concerned about exactly how much carbon dioxide and other pollutants are coming out of smokestacks. But current measurements are clouded