Reviewing her data collected from the previous night, a young PhD student found a puzzling source. She discovered a repeating signal of pulses that consistenlty arrived 1 and third second apart, just like clockwork! Annoyed that perhaps aliens were trying to contact her, Jocelyn Bell Burnell labeled the source LGM-1: Little Green Man-1. Was it a radio signal from ET? What was the source she had serendipitously discovered?! #WomensHistory