Scientists want to define the kilogram by gravity—and not just electricity. Here’s why correctly quantifying mass is more important than you think.

A Capella Science has brilliantly re-imagined this critical scene to focus on the two great physicists behind the theory of gravity: Isaac Newton (Dianna Cowern, a.k.a. The Physics Girl) and ...

Chandra Discovers "Rivers Of Gravity" That Define Cosmic Landscape Date: August 1, 2002 Source: NASA/Marshall Space Flight Center Summary: NASA's Chandra X-ray Observatory has discovered part of ...