As air was pushed through these crests, they likely made a deep bellowing sound similar to a horn. Did dinosaurs communicate? Most paleontologists think so. Like modern-day birds and reptiles, dinosaurs probably made noises to signal that they were looking for a mate, that there was danger, or that theyRead More →
theropod, any member of the dinosaur subgroup Theropoda, which includes all the flesh-eating dinosaurs. Theropods were the most diverse group of saurischian (“lizard-hipped”) dinosaurs, ranging from the crow-sized Microraptor to the huge Tyrannosaurus rex, which weighed six tons or more. How are theropods classified? Theropods are generally classed as aRead More →
The sea temperature averaged 37ºC, so even tropical seas today would be too cold for marine life of the time. But land dinosaurs would be quite comfortable with the climate of tropical and semi-tropical parts of the world. Are scientists trying to get dinosaurs back? Scientists have now discovered moreRead More →
However, during the Jurassic period, which began 200m years ago, they developed into giants. One reason is that, like modern birds, many dinosaur bones were hollowed out by air sacs extending from their lungs, meaning that a dinosaur would have weighed significantly less than a solid-boned mammal of similar size.Read More →
Overwhelming evidence shows that birds evolved within the clade Dinosauria, which is further subdivided into two groups, the Saurischia (“lizard hips”) and the Ornithischia (“bird hips”). Despite the names of these groups, it was not the bird-hipped dinosaurs that gave rise to modern birds. What is the only surviving cladeRead More →
Bottom line: We can’t recreate dinosaurs from their DNA because the DNA no longer exists. DNA disintegrates in about 7 million years, and dinosaurs lived 65 million years ago. Will dinosaurs come back in 5 years? According to scientists, we are officially in a window of time where technology canRead More →
If we used a time machine to travel back to a prehistoric period, the earliest we could survive would be the Cambrian (around 541 million years ago). Any earlier than that and there wouldn’t have been enough oxygen in the air to breathe. Can human and dinosaurs coexist? Did humansRead More →
It’s not possible. The limit of DNA survival, which we’d need for de-extinction, is probably around one million years or less. Dinosaurs had been gone for a very long time by then. Will dinosaurs come back in 2025? According to scientists, we are officially in a window of time whereRead More →
Modern humans are currently thought to have appeared around 300,000 years ago — more than 65 million years after the non-avian dinosaurs disappeared. But, yes, as you may have already pointed out: Not all the dinosaurs disappeared. What would the world be like if dinosaurs never went extinct? “If dinosaursRead More →
Dinosaurs were cold-blooded, like modern reptiles, except that the large size of many would have stabilized their body temperatures. They were warm-blooded, more like modern mammals or birds than modern reptiles. Do dinosaurs have warm blood? The diagram above shows energy usage in a number of animal groups, including birds,Read More →