Velocity rules in October. There have been a record 255 pitches of 100 mph or faster this postseason, up from 105 last year ...

Virtual particles exploit the natural fuzziness of the subatomic world, where if these ephemeral particles live briefly enough, they can also briefly borrow their energy from empty space. The haziness ...

In some parts of Earth's interior, seismic waves travel at different speeds depending on the direction in which they are ...

Most explanations rely on "dark energy" to explain the Universe's accelerating expansion rate, but a new study takes a different path.

Though the principle is not violated, a new way of fudging its restrictions could lead to improvements in ultra-precise ...

When an object is falling, the two main forces acting on it are weight close weightA force that acts on mass, pulling it down, due to gravity. Weight is a force and forces are measured in newtons (N).