T-Rex didn't become famous until after Jurassic Park.

Really? I thought everyone knew T-rex when I was a kid. The only pick for Land Before Time I thought was weird was Duckie because I'm still not 100% sure what she is despite having looked it up a few times. The rest of the cast are what I'd consider your classic dinosaurs. But it's hard to know what other people know when you're an autistic kid.