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Prehistoric Animals
Oil - History
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Prehistoric Animals
Oil accidents– ecological burden of the planet Earth
Dinosaurs were the dominant vertebrate animals of terrestrial ecosystems for over 160 million
years, from the late Triassic period (about 230 million years ago) until the end of the
Cretaceous period (65 million years ago), when most of them became extinct in the
Cretaceous–Tertiary extinction event.
Research has since identified theropod dinosaurs as the most likely direct ancestors of birds;
The 1861 discovery of the primitive bird Archaeopteryx first suggested a close relationship
between dinosaurs and birds.
Size
Even by dinosaur standards, the sauropods were gigantic. Giant prehistoric mammals such as the
Indricotherium and the Columbian mammoth were dwarfed by the giant sauropods, and only a handful
of modern aquatic animals approach or surpass them in size – most notably the blue whale, which
reaches up to 173000 kg (381000 lb) and over 30 meters (100 ft) in length.
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