In previous post, we have learned about the first 5 interesting things about dinosaurs. So, let’s point to the last 5 things on the following list.
6. Why do dinosaurs go on two legs, and others go on all fours?
One of the common characteristics of dinosaurs is that the front legs are always shorter than the hind legs. Thus, all dinosaurs can go straight on two hind legs according to theory. However, why do most dinosaurs eat plants?
The answer is the “weight” factor. Basically, having their bodies grow to the point of becoming too big and heavy has forced them to return to walking on all fours, not being able to stand up on two feet.
7. How do dinosaurs take care of eggs?
According to the fossils the scientists have found, the dinosaurs lay their eggs and laid the eggs in a regular and steady circle in a nest deep in the ground. But at the beginning, scientists thought that they only lay eggs, not care for eggs like most reptiles. But eventually, they realized that dinosaurs had an incubation phenomenon, when they found dinosaur skeletons covering their nests.
8. Are the precursors of dinosaurs very small creatures compared to them?
According to the study, the ancestor of the dinosaur – the Lagosuchus species of the original Archosaur reptile group – was only the size of a rabbit: 50cm long, weighs 100 grams, had a shorter front leg than the hind legs like the later dinosaurs. .
The most famous ancient dinosaur known as the Eoraptor (meaning “bandit of dawn”), lived in the Triassic around 225 million years ago, was discovered in 1991 in Argentina. It only reaches a length of 1 m and weighs 11 kg.
Later, scientists also found many other skeletons smaller than that. The smallest is probably the Microraptor, when they are only … 40cm long and the largest known to date is 83cm, while the largest species: Amphicoelias to 60m long.
9. Some dinosaurs have the ability to regulate body temperature?
Normally, it was not possible because dinosaurs were reptiles. This means that they are all cold-blooded like lizards, and must be warmed in the sun. But for Sauropod dinosaurs, because they are so large, it is thought that if they accumulate heat from the sun, there will be no time to release this heat. Therefore, their ability to regulate body temperature is clearly the most feasible hypothesis.
Besides, according to research results from the bone cross section of some small carnivorous dinosaurs, scientists have realized that if there are cold-blooded dinosaurs, there are others that must have blood. hot. These are the characteristics of birds – those thought to be descendants of dinosaurs.
10. Growing up is big, and when you hatch, it’s tiny
Even for the dinosaurs with the largest size in adulthood, there are also tiny children, different from the imagination of humans. There are newborn dinosaurs weighing less than 3 kg and 40-50 cm long. The reason for such dinosaurs is because they were born in an average egg of only 45 cm long, while the largest ones scientists have found are only 60 cm long.
Of course, in that case, the dinosaur’s egg couldn’t get bigger. Increasing the size will result in the baby dinosaurs can not puncture the egg shell at hatching, meaning that they easily get stuck inside.
Opposite. Young dinosaurs grow as fast as they blow, because the growth rate needs to be fast to gain enough power to defend themselves against other dangerous predators.