Explore 25 universe mysteries scientists are still scratching their heads over, from dark matter to the Big Bang's secrets.

, May 8 -- Scientists have proposed a new theory suggesting that the basic laws of the Universe may be closely linked to the existence of life itself.

Black holes are regions in space where an enormous amount of mass is packed into a tiny volume. This creates a gravitational pull so strong that not even light can escape. They are created when giant ...