Spiral galaxies rotate at such a high speed that the gravity calculated only from their visible stars could not prevent them from dispersing. To solve this puzzle, physicists have postulated ...

Photographs make time travel possible. They often provide a blast from the past that gives us a sliver of an idea of how life was back then. They represent a moment in history when a renowned figure ...

Adrian Bejan’s new book explores how natural laws of physics give rise to the tremendous amount of diversity seen in the ...