3 ms·
Only 2.5B over 2 and a half million years that seems astonishingly low. I wonder if we have any idea about their reproductive lifecycle and lifespan. There are
by dogma1138 6y ago
Only 2.5B over 2 and a half million years that seems astonishingly low. I wonder if we have any idea about their reproductive lifecycle and lifespan.
There are about 1 billion cows on the planet today mostly because we breed them and there are nearly half a million elephants living currently while being hunted by pesky humans.
- klyrs 6y agoT. rex were apex predators, which tend to have fairly low populations compared to herbivores. They're also megafauna, which tend to have fairly low populations compared to smaller animals. So comparisons with cattle aren't really adequate. While I'm sure the error in the population estimate is greater than the estimated value, it does seems to make sense that their population would be quite small. On the other hand, T. rex probably had a significantly larger range than we've found evidence of.
- dogma1138 6y agoSomeone already mentioned this but there are far more killer whales right now and dolphins both who are apex predators and we don’t make it easy for them to survive. There are 25-20,000 lions left after we’ve hunted them to nearly extinction.