If you’ve been planning a time travel jaunt to the Cretaceous period, don’t. And don’t let the Tyrannosaurus Rex’s comically short arms fool you: its mouth is capable of “between 7,868 and 12,814 pounds-force,” or “having a medium-size elephant sit on you.”
This already brings up a non-time travel warning, do not — for the love of god — let a medium-sized elephant sit on you. That’s like a bite from a T. Rex, which you would understand if you attempted time tra —
Oh, god. We’ve opened a time travel logic paradox. Sorry about your universe. We just wanted you to be safe.