STP-H7, launched on Dec. 21, 2021, is a U.S. Space Force science experiment installed on the International Space Station to collect data. Credit: U.S. Space Force WASHINGTON — The Space Force is ...

Despite dozens of experiments over the years, scientists still don't have a precise measurement for gravity's strength. Why is that?

Physicists are closing in on a strange, hidden influence that does not fit neatly into the four familiar forces of nature, and the search is reshaping how detectors are built and where they are ...

Researchers may be on the brink of discovering evidence of a fifth fundamental force. As far as we know, at the most basic level, the universe is made up of fundamental particles and controlled by ...