A new map of cosmic expansion suggests that dark energy evolves over time, hinting that the universe doesn’t work the way we ...

Understanding how particles such as electrons travel vast ... When you shout at your friend across a field, say, the sound waves travel through the air between you two to reach your friend ...

“Second sound is the hallmark of superfluidity, but in ultracold gases so far you could only see it in this faint reflection of the density ripples that go along with it,” lead author Martin Zwierlein ...

To capture the imagery, NASA used ground telescopes with special filters that detect air distortions, such as shock waves, around the supersonic aircraft. On Jan. 28, the aircraft broke the sound ...