Does E always equal mc²? University of Arizona physicist Andrei Lebed suspects not - and plans to try and check.
NASA's twin Grail probes have revealed the surface of the moon in unprecedented detail, showing unbelievably deep cracks, craters and tectonic structures.
Two mathematicians have, rather bravely, proposed a unified theory of dark matter and dark energy that alters Einstein's equations describing the fundamentals of gravity.
Did you know that top-heavy structures are actually far more likely to maintain their balance while hovering in the air compared to those with a lower center of gravity?
NASA's twin GRAIL spacecraft will be placed into orbit around the moon over the New Year weekend, in preparation for their mission to study its composition and gravity field.
The European Space Agency has released a model of the Earth showing how gravity varies across its surface.
NASA is preparing to launch the first human-like robot to space as part of the Discovery STS-133 mission planned for September.
Astrophysicists have for the first time got the opportunity to watch a planet being distorted and destroyed by its host star.