Fading dinosaurs

Author: Martin Oliver
Publisher:
Publish Date: 2004-03-01
Features:
Initially, dinosaurs evolved and ruled the Earth for millions of years. Later, some unexpected events led to their extinction from the world. Now, we still lack sufficient understanding of dinosaurs! The insights you gain from this "dangerous" guide will absolutely exceed your imagination. You will have the opportunity to explore alongside these marvelous animals that once existed but ultimately perished; discover the mysteries that poor paleontologists have devoted their lives to unraveling; uncover the ancient catastrophe that caused the extinction of dinosaurs, as well as their diet, and even those ancient relics that resemble dinosaur dung. Conduct a little experiment—use the knowledge about dinosaurs you've gained from the "guide" to test your friends and see if you can become a dinosaur detective.
1. When paleontologists discovered a dinosaur egg, they faced a big challenge—how could they see what was inside it? In the early days, people used X-ray machines, but now all it takes is placing the dinosaur egg on a CT scanner. These devices can provide clear images that reveal all the secrets within the egg and reveal other secrets about the baby dinosaurs inside. With the help of CT scanners, scientists have discovered many secrets about the baby dinosaurs inside the eggs. In many ways, they are like human children—noisy, messy, and a bit smelly—but there are also many differences.
2. You might think: Dinosaur coprolite fossils just look like a pile of disgusting waste. But paleontologists are eager to hold those dung fossils in their hands. By closely examining these foul-smelling fossilized remains, scientists can deduce the size of dinosaur intestines, what they liked to eat, and more. Before dirtying their hands, paleontologists first give these dinosaur dung fossils a "shower" with hydrochloric acid. Hydrochloric acid slowly dissolves the rocks and minerals surrounding the dung, and after removing this hard outer shell, the food eaten by the dinosaurs gradually reveals its "true face." Under a microscope, paleontologists can even see what the dinosaur's last meal was. Sometimes, the results are surprising—it's almost certain that most dinosaurs ate whatever they could find, devouring it greedily.
3. Fossilized footprints can also reveal incredible information about dinosaurs. Through the following step-by-step research, you'll quickly discover something. One of the rarest fossilized remnants of scaly-skinned dinosaurs is the impression of fossilized dinosaur flesh or a piece of scaly skin. When the skin of a dead dinosaur began to rot, its imprint was left on the rock surface, which then turned into a fossil through mineralization. Unfortunately, although these impression fossils show that dinosaur skin was hard and scaly, no one can be certain about their color or the patterns on their bodies. The best conclusion scientists can draw is that for dinosaurs, the most successful survival strategy was to blend in with their surroundings, so their possible colors were likely camouflaged. The astonishing fossilized footprints from the Isle of Wight left a deep impression on paleontologists, but when they were found alongside the skeleton of Archaeopteryx, they were absolutely unforgettable. The discovery of this strange "dinosaur" directly sparked one of the most intense debates in the history of paleontology. When was the first Archaeopteryx fossil discovered? The first Archaeopteryx skeleton fossil was found in a quarry in Germany in 1861. What was so surprising about this discovery? This new find showed a perfectly preserved, uniquely fossilized impression. Its uniqueness lay in the fact that instead of scaly skin, the Archaeopteryx was covered in beautiful feathers! Why is there so much debate about Archaeopteryx? Before its discovery, no one had ever thought that dinosaurs could have beautiful feathers. I'm sure you'd say: Paleontologists must have been thrilled with this new discovery. Guess correctly, but unfortunately, that's not the case. Why not? Because after careful study, Archaeopteryx revealed some incredible facts. For example? Although Archaeopteryx had beautiful, bird-like feathers, its skeletal structure was very similar to that of small dinosaurs like Compsognathus, and it also had other reptilian features, such as a long tail bone and claws on its forelimbs. What does this mean? Scientists eventually concluded that Archaeopteryx was a strange dinosaur that was half-bird and half-reptile. Was this discovery so special? Of course. Because Archaeopteryx had both dinosaur-like bones and bird-like beautiful feathers, scientists proposed that it represented a missing link in the evolutionary chain from dinosaurs to modern birds. How did this happen? Well, the principle lies in this: Early birds and small carnivorous dinosaurs like Compsognathus had almost identical skeletal structures. Over millions of years of evolution, feathers evolved from scales, and then the teeth and clawed fingers of dinosaurs gradually disappeared. The dense, solid bones of dinosaurs also became hollow, and their forelimbs gradually transformed into wings, until finally, they could fly. I understand. So what's the big deal? That's a great question. If modern birds really evolved from dinosaurs, we can infer that birds and dinosaurs likely shared some similar features. Can you give me an example? For beginners, here are two excellent examples. Since all modern birds are warm-blooded and move quickly, we can infer that dinosaurs were likely the same. Now I understand. So does the discovery of Archaeopteryx conclusively prove that dinosaurs and birds are closely related? Is this conclusion something that everyone is happy about? Unfortunately, that's not the case. Scientists have many different views on Archaeopteryx. So, let's continue! A scientist simply explained: Archaeopteryx was just a deformed bird. I'm sure some clever people could refute this idea. You guessed right. A sharp-eyed paleontologist pointed out an unexplainable phenomenon in this theory, noting that there was a group of teeth in the mouth of Archaeopteryx—clearly a reptilian feature, not a bird's. But that didn't stop others from trying other explanations, did it? Congratulations, you're right again. Andreas Wagner claimed that Archaeopteryx was just a reptile that independently evolved feathers. That sounds a bit stretched! His next explanation was even more stretched. He even tried to change the name of Archaeopteryx, suggesting it should be called "Griffinosaurus." Griffinosaurus is a mythical creature with an eagle's head, a lion's body, and wings. Enough said. But was there no one else who had objections to Archaeopteryx? Of course, there was. Sir Fred Hoyle believed that Archaeopteryx was a deliberately fabricated fake. What? You mean a forged fossil? Yes. He claimed that scientists had created a fake fossil to prove the correctness of evolution. I bet this definitely made Sir Fred Hoyle famous quickly. Sorry, but you're wrong. This professor was ridiculed and attacked for this claim. Once, when he gave a lecture at the Royal Institution in London, he even had to request special security. So, how did his proposal turn out? After various tests, it was eventually proven that the fossil was real. But wouldn't there be problems with those tests? Subsequently, five more complete Archaeopteryx fossils were discovered, which settled the matter. So, what's the current situation? So far, no one has truly opposed this theory, but you never know what tomorrow will bring.