Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

The Polaris Dawn crew Jared Isaacman, Scott "Kidd" Poteet, Sarah Gillis and Anna Menon explain the experiments conducted during the mission. Also, see a time-lapse of Isaacman's spacewalk. Credit: ...

Oct. 25, 2025: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend. When you purchase through links on our site, we may ...

The decade's old public health intervention has been a big boost in the fight against tooth decay. By Lauren Leffer Published Apr 9, 2025 12:00 PM EDT Get the Popular Science daily newsletter💡 ...

This video is part of “Innovations In: Type 1 Diabetes,” an editorially independent special report that was produced with financial support from Vertex. Tom Lum: On the surface, this may look like ...