While no gravity in space is, let’s be honest, pretty cool, it comes with some downsides. Without the constant weight of the world on their shoulders, astronauts’ bones and muscles can grow weak.

General relativity tells us this photon would follow a classical path that aligns with the curves and contours of space-time from ... a "holograph — with no gravity. In this projection, the ...

New mathematical work provides a way to identify when information has been changed by manipulating space-time – and it may ...