How did dinosaurs appear? Detailed answer

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How did dinosaurs appear? Detailed answer

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How did dinosaurs appear?

Scientists suggest that dinosaurs appeared about 180 million years ago and died out about 60 million years ago. Since dinosaurs were reptiles, they must have descended from the reptiles that lived before them. Reptiles, by the way, are a separate class of animals, which are characterized by the following: they are not warm-blooded, can live on the ground, have a peculiar heart, and most of them are covered with scales.

The first reptiles appeared long before the dinosaurs. They looked like amphibians (they could live both in water and on land). But eggs were laid only on the ground. The cubs had legs and lungs and could breathe air; may have eaten insects.

Then the reptiles got bigger and stronger. Some resembled large lizards, others - turtles. They had short tails, thick legs and large heads. They ate plants.

The first dinosaurs resembled their reptilian ancestors, who resembled pangolins and who could walk on their hind legs. The first dinosaurs were small, about the size of a turkey, and could also walk on their hind legs. Some species remained small, but others became heavier and longer. At one time, many of them were 2,5 m long. There were even a few 6-meter ones that weighed like an elephant. They had small heads and short, blunt teeth that were good only for chewing plant foods. They lived in low, swampy places.

Then came another period of the reptilian age. Some herbivorous dinosaurs became so large that even on four legs they could not keep themselves on land. They began to spend most of their time in rivers and swamps. One of these giants is called a brontosaurus, 20-24 meters long, weighing about 34 tons.

At the same time, other dinosaurs moved quietly on the ground, one of them - the Allosaurus - was 10 meters long, had sharp teeth and claws and fed on brontosaurs and other herbivores. So dinosaurs were a stage in the development of reptiles. They disappeared due to climate change on Earth, which deprived them of their habitats and food.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What nationality was the Duke of Wellington?

Irishman.

Despite his reputation as one of the most eminent English generals, Arthur Wellesley, 1st Duke of Wellington, was unquestionably Irish.

He was born in Dublin in 1769 to the Wesley family, whose ancestral home was at Dungan Castle, near Trim, County Meath. The parents of his future wife were the Longfords - one of the most noble Irish families. In 1790, Arthur even served in the Irish Parliament.

If anyone needs further proof of his nationality, Arthur's decision to play for the national team in the first officially registered cricket game in Ireland in August 1792 can be recalled. Their rivals then were the team of the local British garrison from Dublin. Of the two innings, the Duke recorded a clearly inexpressive number of runs counted - six.

The Duke's grandfather, the 1st Baron Mornington, was called Richard Colley, but having inherited a huge fortune from a distant relative, he took the name Wesley. On the one hand, the Collies had lived in Ireland for centuries, but the Wesleys were richer and could boast that their ancestor had come to Ireland with Henry II as a royal standard-bearer. In 1798, the Duke and his family changed their surname once more to Wellesley, simply because it sounded more luxurious.

Even during the life of the duke, a serious debate unfolded about his Irish origin. Very often the words allegedly spoken by the duke himself as a refusal to recognize his connection with Ireland are quoted: "A man can be born in a barn, and at the same time not be an animal." However, there is no evidence to support this saying - most likely, the phrase was born as an obscene palace gossip.

Wellington has always been proud of his ties with Ireland, just as the Irish are proud of their distinguished countryman: at the eastern entrance to Dublin's Phoenix Park stands a (62,5 m) monument to the duke.

Another quote that Wellington never uttered: "Victory at Waterloo was forged on the sports fields of Eton." For the first time this phrase was attributed to the duke four years after his death by the French historian Comte de Montalembert in his work on the propaganda of Catholicism.

It is worth noting that when Wellington had a very short - and unsuccessful - time at Eton, there were no athletic fields at the college, and the Duke himself was noted as a student known for his complete lack of enthusiasm - as well as talent - for sports games.

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