WOW? NOT NOW
The famous “Wow!” signal detected in 1977 is often cited as evidence for alien life. But in January, a Florida academic determined that the 72-second emission likely came from two comets.
In 2015, Australian astronomers figured out that the baffling radio signals they had detected during daytime for the past 17 years were caused not by E.T. but by a microwave in their observatory.
Scientists in Arecibo, Puerto Rico, were disappointed in 1997 when a signal seemingly from a constellation 22 light-years away turned out to be from a satellite a million miles from Earth.
This appears in the September 12, 2016 issue of TIME.