Because Time Travel Has Consequences

Hey GorT,

Remember when you let those whackjobs from 2113 borrow your time machine, because they wanted to go back to a simpler time and live out a nice pastoral utopia?

Guess who just turned up?

Explains why they never wrote back.

And wait until the archaeologists have to explain the DNA does not match any Filipino. Or why they were found with all that NASCAR memoribilia.