Scientists pointed a giant telescope at 3I/ATLAS to scan for alien life — this is what they found

It is unclear whether a [3I/ATLAS] would transmit radio signals … such signals would take tens of thousands of years to cross ...
Modern Engineering Marvels on MSN

New research: Are radio-bright galaxies hiding alien transmitters?

Across the observable universe, galaxies advertise themselves in radio waves for familiar reasons-magnetic fields, cosmic ...