Dark Energy
Dark energy, the mysterious and hypothetical force that scientists think is causing the expansion of the universe to accelerate, may actually be growing over time, according to one new study.

About 20 years ago, scientists discovered dark energy by measuring the light coming from exploding stars, known as supernovas. Dark energy is thought to permeate all of space and, by continuing to study the light coming from supernovas, scientists have observed the effects of dark energy a