Scientists working to study black holes use specific radio frequencies to track black holes, the same frequencies often used by phones and wifi. This article was originally published at The ...

AST SpaceMobile plans to use the spectrum in a limited capacity. Still, it faces fierce pushback from amateur radio groups, some of which claim interference is already happening. Facing thousands of ...

Even in crystal-clear water, it can be easy for scuba divers to lose track of which way they're heading. An experimental new underwater navigation system could help keep that from happening, using a ...