Astronomers have detected the first-ever "radio signal" coming from the interstellar comet 3I/ATLAS, right as it passed the halfway mark on its oneway trip through the solar system. And while this may ...

Dec. 12, 1901 marks the date of the first radio transmission across the Atlantic by Reginald Fessenden. Scott Mason, our Tar Heel Traveler, tells us more about Fessenden and his accomplishment. Dec.