Is Oumuamua an alien spacecraft?

Last year, astronomers discovered a bizarre rock from outside our solar system zipping past Earth. This year, two researchers have made the extroardinary claim that this rock could actually be alien technology...but is the evidence extroardinary enough to support it? Charlie brings in their paper and gets to the bottom of a story that has been covered in controversy, misinformation, and extraterrestrial inspiration. Read the paper here.