I found five pennies in parking lots in the past month. The oldest penny I found was from 1972 so I’ve concluded that pennies didn’t exist in the 1920s.
The science of pennies is now settled.
In Los Angeles, CA someone dug a hole 10 ft down, found copper wires, and concluded that they had phone lines 100 years ago.
In New York, NY someone dug a hole 20 ft down, found copper wires, and concluded that they had phone lines 200 years ago.
In Lincoln, NE someone dug a hole 30 feet down, didn’t find anything, and concluded that Nebraskans went wireless 300 years ago.
I think the credit for the above goes to Larry the Cable Guy.
I found a 1984 penny in a parking lot that was not built until 1998.
It is absolute, incontrovertible proof of time travel, teleportation, alternate universes and likely counterfeiting.