Science

Find the latest science news articles, photos and videos covering space, the environment, human development and more on NBCNews.com.

A replica of the International Prototype Kilogram is pictured at the International Bureau of Weights and Measures in Sevres near Paris

Benoit Tessier / Reuters

Science

Historic vote to redefine the kilogram changes forever the way we measure mass

Image:

Eric Risberg / AP

California Wildfires

California schools close as smoke from Camp Fire fills the skies

Why wildfires and hurricanes could get even worse with climate change

U.S. news

Why wildfires and hurricanes could get even worse with climate change

The Boomerang Nebula

NASA, ESA and The Hubble Heritage Team (STScI/AURA)

Science

What is absolute zero?