Did You Know? Dinosaurs Walked the Earth for So Long, There Was a 'Prehistoric Gap' Between the T-Rex and the Stegosaurus!

Posted on Apr 19, 2026
tl;dr: The time difference between Stegosaurus and T-Rex (80 million years) is *greater* than the time difference between T-Rex and humans today (66 million years), showing how vast the 'age of dinosaurs' really was.

Hey there! You know how sometimes we talk about ’the age of dinosaurs’ as if it was one big, continuous thing? Well, prepare for a little mind-bender that might just change how you picture those ancient giants.

Ready for it? The time separating the Stegosaurus from the Tyrannosaurus Rex is actually greater than the time separating the Tyrannosaurus Rex from us right now!

Think about that for a second. We tend to lump all dinosaurs together, right? Like they were all hanging out at the same prehistoric party. But the reality is that the Stegosaurus, with its cool plates and thagomizer tail, lived during the late Jurassic period, which was about 150 million years ago. Fast forward 80 million years (that’s an insane amount of time!), and you finally get to the late Cretaceous period, where the mighty T-Rex strutted its stuff, around 66 million years ago.

So, if you put it on a timeline:

  • Stegosaurus (150 million years ago) —————– 80 Million Years —————– T-Rex (66 million years ago) —————– 66 Million Years —————– You and Me (Today!)

That’s a huge chunk of time! It means the T-Rex was closer in time to the first human ancestors than it was to the Stegosaurus. There was a whole era of other dinosaurs, mass extinctions, and evolutionary changes that happened in that 80-million-year gap between when Stegosaurus roamed and when T-Rex became king. It truly puts into perspective the incredible, almost unimaginable, stretches of time in Earth’s history and how relatively recent our own appearance on this planet truly is. It’s like looking at ancient Rome and then looking at modern New York City and realizing there was an entire Ice Age in between!