Cows
no
Humans are the answer! humans caused more animals to go extinct than any other animal.
There is NO North Vietnam & South Vietnam today (and there hasn't been a north & south for over 30 years; when the north conquered the south, ending the war in 1975). Today's Communist Vietnam is President Triet.
All animals that we know today will eventually become extinct, but there is no way to know if it will happen within your lifetime.
Because other animals that are extinct today may have existed
North anerican horses, the horse in America today are from Europe
All animals that live today, or maybe more because people made some extinct
Three animals that are now extinct are: New Zealand's moa, North and South America's dire wolf, and Europe and Asia's giant cheetah. Ninety percent of all the animals that have ever lived on this planet are now extinct.
north
Fossils are the only way to learn which animals are extinct or have changed over time. We can look at animals that exist today and speculate concerning on the appearance of a common ancestor. We frequently have to change our opinion when we find a fossil.
Same as today, but more than this- can add the extinct species of last twenty five centuries
As they are extinct there is little importance to modern societies other than those people that study prehistoric animals.