Every time a coffee mug drops, a satellite orbits or an astronaut floats, we are watching the same phenomenon play out under ...

Legend has it that Isaac Newton had the moment of inspiration that would lead to his theory of gravity when, on a warm ...

What goes up -- A natural tendency -- Gravity falters -- And yet it moves -- Action at a distance and other gravitational mysteries -- Warping the universe -- Einstein's masterpiece -- One of four -- ...