Old 9th Jan 2019, 21:14
  #3 (permalink)  
Resident insomniac
Join Date: Aug 2005
Location: N54 58 34 W02 01 21
Age: 75
Posts: 1,859
If the origin of the signal is from 'humans', then the distance implies (as suggested) that their existence was some considerable time ago.
The possibility of 'aliens' having visited Earth (and masterminded the Pyramids) becomes (slightly) more likely . . .
G-CPTN is offline