Ishango Bone diagram: 20,000 year old african mathematical device
The Wow! Signal A strong narrowband radio signal detected by Jerry R. Ehman in 1977. -The signal bore the expected hallmarks of non-terrestrail and non-Solar System origin. It lasted for the full 72-secon window that Big Ear was able to observe it, but has not been detected again. The signal has been the subject of significant media attention. Read more HERE-