Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

The interstellar comet 3I/Atlas reached its closest point to the sun. Here's how to follow the rest of its journey away from ...

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

During the 1240s, Richard Fishacre, a Dominican friar at Oxford University, used his knowledge of light and color to show ...

A newly discovered comet named C/2025 V1, which some have compared to 3I/ATLAS, is due to make its closest approach to Earth on Tuesday, Nov. 11.

Many solar eclipse maps use clean lines to represent the path of totality, but the reality isn't so clear cut, and those maps just aren't entirely accurate.

The three interstellar objects are unique, billion-year-old fragments and kinetic artifacts collected from countless ...