The mind-bending concept of time dilation results from a seemingly harmless assumption—that the speed of light is the same ...

The 54-pound NWA 16788 has set a new world record as the most valuable meteorite ever sold at auction. The first major ...

How old is the universe? Learn more about the age of the Universe, from it's explosive beginnings to how we on Earth can ...

Quantum networking is being rapidly developed world-wide. It is a key quantum technology that will enable a global quantum ...

Though their source was unknown, the precisely spaced radio pulses coming from light-years away seemed to be the distant clock needed to measure earth time.

Why does time change when traveling close to the speed of light? – Timothy, age 11, Shoreview, Minnesota Imagine you’re in a car driving across the country watching the landscape.

THE clock paradox of relativity is, in my view, due to an error in Einstein's paper1 which has not hitherto been noted and which may be more obvious to an experimental than to a theoretical physicist.

This is no ordinary clock — it's a highly precise instrument built to put Einstein’s theories of special and general relativity to the test.

Albert Einstein's theory of general relativity is based on the idea that massive objects cause a distortion in space-time, which is felt as gravity ...