Why is the expansion of our universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...

A father-daughter duo has decoded an alien-like signal beamed from a spacecraft in 2023. Now, citizen scientists are trying ...

There are different ways to interpret the data. The United States relies ever more heavily on overseas researchers: more than one-third of science and engineering PhDs granted last year went to ...