Like 2.5B T. Rexes! Have walked the Earth. According to a new study. That’s a lot, but might explain some of the people at the gym I frequent.
They were around for 2.4 million years? I bet the later T.rex scientists considered those early ones to be a different species. “You can clearly see they have longer arms than us evolved terror lizards,” or something.
That doesn’t sound like so many.
Maybe not. But if dinosaurs were around for 2.5M years, and there were 2.5B of them, that’s only 1000 T-Rex per year. Though these numbers are likely wrong, I’m not sure how comforting a 20:1 ratio of people to T-Rexes would be. Good thing they were mostly in Alberta. 
Another version of this article:
says that “the total population could be as little as 140 million or as much as 42 billion with 2.4 billion as the middle value”. That is some range there.
1000 new T-Rex a year. They’re probably assuming a 20 year lifespan.
That makes the ratio 1:1 assuming the human population was static, because of dinosaurs and such.
There is a comedy routine about Jesus commenting on the dangers of dinosaurs, but I can’t remember who does it. I thought it was funny.
127000 generations of T-rexes and only about 7500 generations of modern humans so far…
Guess we should stop making fun of their ability to do push ups.
Well, there were between 140 million and 42 billion of them. So, yeah, not an especially firm number.
If there were that many apex predators, try to imagine how many of the prey dinosaurs there must have been…
On the fourth day of a Christmas, my true love gave to me: Thirty billion Raptors, Twelve billion Brontosaurus, Three billion T-Rex and a beer…