Not a very funny joke - but a joke nontheless!
A Russian Archielogist was digging up earth to 10 meters and discovers copper cables laid down. WIth research he concludes that 1000 years ago native Americans were already using telephones.
In response a Russian Archielogists digs up earth 50 meters and discoveres fiber-optic cables. They concude that 5000 years ago Russian already had high-speed digital communication.
The next week a Paksitani archeologist wanted to prove something too. He dug up earth 100 meters below and discovers absolutely nothing. He concludes in a press conference that 10,000 years ago paksitani’s were already using mobile phones.