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How many animals are excinct?

It is hard to determine exactly how many animal species are extinct because some species become extinct before scientists even know they existed. As far as science can tell, there are over 900 extinct species.


How many dinosaurs are the re?

Scientists have discovered about 1,000 species of dinosaur, divided among about 500 genera. This is probably only a fraction of the number of dinosaur species that existed. It also doesn't account for 10,000 living bird species, which are technically dinosaurs.


How many scientists believe extinction is real?

Essentially all of them. The fossil record indicates that many species that existed in the past are no longer alive. Regrettably some species that were being monitored in recent decades have disappeared and numerous species that are also being watched at the present are in sharp decline.


How many sapient species have existed on earth?

One.


Why can't we say exactly how many species there are?

Because new species form every single day which adds more to what scientists know. By the way, Did you know there are hundreds of species of animals out there that scientist have not yet discovered.


Most of what scientific know about extinct species is based on?

Most of what scientists know about extinct species is based on the study of bones and fossils. Scientists have studied many dinosaur bones to determine what they ate and how they lived. Fossils tell what the land was like at a given time in history.


How many species have gone extinct since 1681?

It is hard to calculate the number of animals that have become extinct since 1681 since some species went extinct before scientists knew they existed. What is known is that more than 90 species of birds and hundreds of species of mammals have gone extinct since then.


How many species on Earth have antennas?

It is impossible to know exactly how many species on earth have antennas. All insects have antennas and although only 900,000 have been recorded most scientists believe there could be as many as 5 million species of insects.


How many dinosaurs was in total in the past?

We do not know the total number of dinosaurs that existed, as many have not been discovered. Currently, there are 500 known genera and 1,000 different species.


How many different kinds of organisms have scientists discovered?

Scientists have discovered and described approximately 1.75 million species of organisms. However, it is estimated that there may be as many as 8.7 million species on Earth, meaning that many more species are yet to be discovered.


How many amphibians can you see in the world?

Scientists know of about 7,000 species of amphibian. There may be many more living in remote parts of rainforests. Regardless, one person could probably never see all of these species in their lifetime.


How many know genus of aspergillus are know to man?

Aspergillus, a genus name referring to many different species of mold, has several hundred known species. The name comes from aspergillum, a holy water sprinkler.