Rapid particle acceleration is possible using a fixed-field alternating-gradient machine—but ‘scaling’ in its design has been necessary to avoid beam blow-up and loss. The demonstration now ...

Because if you graph a quad­ratic equation, you get a parabola! For an object with constant vertical acceleration, the following formula describes its height (y) as a function of time (t).

New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead suggesting giant voids in space are creating an illusion.

COSMIC TRIO Three astrophysicists share the 2011 Nobel Prize in Physics for their discovery that the universe’s expansion is speeding up.