70 million years ago belonged to the late Cretaceous period of the earth. During that period, there were many fascinating dinosaurs, such as Tyrannosaurus rex, Triceratops and Ankylosaurus. In addition, many mammalian ancestors also appeared during that period, such as early members of the subclass Eotheria, as well as other species of reptiles, such as turtles, crocodiles, and lizards. In short, the biodiversity 70 million years ago was very rich, including various dinosaurs, mammals and reptiles.
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Elephants are good swimmers and have some water-adapted features that allow them to swim in water. Here’s a detailed look at elephant swimming abilities:Physiological characteristicsBuoyancy: The elephant's body structure makes it highly buoyant. The musculature in their bodies is very dense an...
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Spiders are not insects, but creatures that belong to the class Arachnidae of the phylum Arthropoda. Although spiders and insects both belong to the phylum Arthropoda, they belong to different classes with different characteristics and biological classifications. Here are some key d...
Cat lifespan varies depending on factors such as breed, health, and lifestyle. Generally speaking, the lifespan of a domestic cat is about 12-20 years. Some breeds can even live to be over 20-25 years old.Here are some factors that affect a cat's lifespan:1. Diet: Providing a nutritionally balan...
Chinese Merino sheep, also known as South China fine-wool sheep, are a sheep breed in China known for their high-quality fine wool. It originated from the Australian Merino sheep and was improved and adaptively bred in China. The appearance characteristics of Chinese Meri...
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In addition to the primary sexual characteristics - the difference between the ovaries and testes - people mainly use secondary sexual characteristics (or secondary sexual characteristics) to identify the sex of fish. However, secondary sexual characteristics are usually more obvious during the re...
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