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Brontosaurus wasn't an actual species. This was an error on the part of paleontologists at the time, who reconstructed this supposed species using the bones of more than one species. So, to answer you question, the brontosaurus didn't ever live.
Brontosaurus is actually an invalid name for Apatosaurus excelsus. Apatosaurus existed from 154 to 150 million years ago, which was during the Kimmeridgian and Tithonian stages of the Jurassic period of the Mesozoic era.
only one other person was alive at the time, so one
There are a set of rules for giving dinosaurs their scientific names, and one of those is that the first name given to a dinosaur is the one that is used. Since the name Apatosaurus was used before Brontosaurus, that is the one that should be used and Brontosaurus is therefore not the right name to call it. There are a set of rules for giving dinosaurs their scientific names, and one of those is that the first name given to a dinosaur is the one that is used. Since the name Apatosaurus was used before Brontosaurus, that is the one that should be used and Brontosaurus is therefore not the right name to call it.
Othniel Charles Marsh discovered one species of Apatosaurus, and named it Apatosaurus ajax. When he discovered Apatosaurus excelsus, though, he assigned it to its own genus, Brontosaurus. Later it was found that both Brontosaurus and Apatosaurus ajax belonged to the same genus, so Brontosaurus was reassigned to Apatosaurus excelsus.
You do not make one. They are created naturally.
We have no DNA from Brontosaurus, or any other dinosaur. DNA can last hundreds of thousands of years in permafrost, but no Brontosaurus fossils have been preserved constantly in permafrost. Additionally, Brontosaurus fossils are millions of years old, not hundreds of thousands, so even if it had been constantly frozen they probably would still have no DNA left. One last note: Brontosaurus is not a real dinosaur; you are referring to Apatosaurus.
At any time, it is estimated that there are some 10 quintillion (10,000,000,000,000,000,000) individual insects alive.
I think it is biotic.
Brontosaurus is an invalid name for Apatosaurus excelsus. Apatosaurus excelsus existed from about 154 to 151 million years ago, during the Kimmeridgian and Tithonian stage of the Jurassic period.
Othniel Charles Marsh discovered one species of Apatosaurus, and named it Apatosaurus ajax. When he discovered Apatosaurus excelsus, though, he assigned it to its own genus, Brontosaurus. Later it was found that both Brontosaurus and Apatosaurus ajax belonged to the same genus, so Brontosaurus was reassigned to Apatosaurus excelsus.
Othniel Charles Marsh discovered one species of Apatosaurus, and named it Apatosaurus ajax. When he discovered Apatosaurus excelsus, though, he assigned it to its own genus, Brontosaurus. Later it was found that both Brontosaurus and Apatosaurus ajax belonged to the same genus, so Brontosaurus was reassigned to Apatosaurus excelsus.