don't know. think is the climate changes.
Animals are extinct when there's no known animals part of the species still alive.Or, if you're asking how they become extinct, that can be because of many causes.
The same problem occurs with other endangered species, it causes an environmental disturbance, but hornets is very improbable to become extinct.
The greatest danger to blue whales was being hunted by humans.
They are not extinct.
They are not extinct.
They are not extinct.
Snails are actually mollusks and crustacean. They are very unique creatures.
The are not fully extinct but nearly extinct.
Most become extinct because they can not adapt to changes in their environments. Those that can don't become extinct.
Habitat destruction is a main cause of animals become endangered or extinct. What causes it is humans clearing the land for industry and natural disasters such as floods and fires.
Mollusks win this one, with the 8 following species: Caudofoveata Aplacophora Polyplacophora Monoplacophora Bivalvia (bivalves) Scaphopoda Gastropoda Cephalopoda Cnidarians have the following 5 species (one extinct): Anthozoa Scyphozoa Cubozoa Hydrozoa Conulata - extinct
literally millions already have, about 96% of all species on the planet throughout history have gone extinct due to natural causes. If you mean directly because of humans then 438 have gone extinct. And indirectly about 3000.