How researchers propose to search for dark matter. The torsion balance is a geometrically asymmetric structure with a hollow “spherical shell” on the left and a “solid sphere” on the right. The impact ...

Can your kids balance 14 nails on one? Beth Harris, science educator, has a challenge for them ... and a little lesson about center of gravity. Beth Harris, Raleigh mom and science educator, returns ...

Study authors Hunter Schweiger (left) and Ash Robbins. Imagine balancing a ruler vertically in the palm of your hand: you have to constantly pay attention to the angle of the ruler and make many small ...

Dark matter is believed to make up a large fraction of the matter in the universe, yet its true nature remains unknown. Most past experiments have focused on heavier dark matter candidates, while much ...