T-Rex: Let's say you're an ancient seaborne intelligence who can alter mortal minds and hates other life and wants to raise sea levels so that it can drown the Earth. What do you do? I'll tell you what you do: you take over one man's mind and use him as a pawn!!

T-Rex: You make this ONE MAN do your bidding, changing the climate as effectively as possible!

T-Rex: But let's be scientific about this: if my "ghastly underwater mind" theory is true, then we should be able to go back in time and find one man - one single person - who seemed hellbent on destroying the planet. And do we? HECK YES WE DO. One Thomas Midgley, Jr. The man synthesized Freon, aka the first CFC. Remember them? The chemicals responsible for DEPLETING THE FRIGGIN' OZONE??

Utahraptor: But SOMEONE had to invent CFCs, right?
T-Rex: If that's where he stopped, I'd agree with you!

T-Rex: But Thomas also invented LEADED GASOLINE. The dude dumped NEUROTOXINS into GASOLINE, and ignored it when his staff became plagued with INSANITY. From LEAD-POISONING. You know, before they DIED. Yeah, that DEFINITELY doesn't sound like the work of a hateful intelligence that despises ALL LIFE BUT ITSELF.

T-Rex: Thomas died only after ACCIDENTALLY STRANGLING HIMSELF in a system of pullies he invented. An accident? Or the last act of his original mind, desperate to end his reign of destruction??
T-Rex: In conclusion, the oceans are terrifying and will swallow us all, the end