Fish school, insects swarm and birds fly in murmurations. Now, new research finds that on the most basic level, this kind of group behavior forms a new kind of active matter, called a swirlonic state.

Asteroid Bennu shows no signs of a “fifth force” affecting its orbit, researchers report A hypothetical “fifth force” could tug on asteroids, if it exists. But the asteroid Bennu shows no signs that ...

The universe is packed with riddles, but few are as stubborn or as fascinating as dark matter. First proposed in 1933 by astronomer Fritz Zwicky, this elusive substance refuses to play by the rules: ...