Much of our understanding of Earth's past is derived from stratigraphic records exposed in rock outcrops or recovered from drilled cores. These records span immense time intervals, from thousands to ...

And because the speed of light is very, very large compared to everyday speeds, very small mistakes in the measurement of time get reflected into significant changes in distance. So if you make small ...

We experience the flow of time because it’s a natural outcome of the basic laws of physics. But we may need to build a whole new model to account for gravity’s influence.

It feels so obvious that time moves forward that questioning it can seem almost pointless.