How many different kinds of dinosaurs were there?
We know of about 300 kinds now, half of those from a single tooth or bone. We do find a reliably new kind of dinosaur every seven weeks on average though! That means that half of all dinosaurs have been named since I was a kid which is not all that long ago only 30 years not 65 million. There were probably thousands of kinds of dinosaurs, but we haven’t found most of them yet. We don’t get a great sample because fossils are usually only made in lowland areas where bones get covered over by mud even though dinosaurs lived all over. And we only find fossils where rock from dinosaur time is now near the surface. Lots of places have dinosaurs but they are deep in the ground. And in lots of places the weather wasn’t right to turn dinosaurs into fossils. (Don Lessem) A: The count is over 650 species of dinosaurs, although not all of these are valid. These species occur in over 400 genera. There are many more species of plant-eating dinosaurs named than carnivores because carnivores were fewe
