and how would u intend on eating it again in the past if u already ate it in the future?
by killing ur past slef?
that would create a time paradox u know
"Too bad, I'd want to go back and see some dinosaurs."
I wouldn't doubt that we wont see them in our lifetime. The plotline from Jurassic Park could actually become a reality, they're already in the process of bringing mammoths back to Siberia.