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Hard to say. They may never go extinct. But I've heard some people say they will go extinct in 20 years (lowest estimate I've heard).
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In some cases, polar bear population is increasing, in some, decreasing. UN staff indicate that they COULD become extinct in a century, but the changes in population growth could mean they wil not become extinct.
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How long has grizzly bears been extinct?
They have never been extinct. They may be endangerd due to poaching.
How long is it predicted before dugong s are extinct?
no.
How long is an animal endangered before it is classified extinct?
It is classified as extinct when there are NO animals of that species left, not one.
How long does a specie last before it can extinct?
they can last forever
How long before tigers are extinct?
about 10-40 years
What did triceratops eat long ago before they were extinct?
Plants.
Which became extinct most recently Triceratops brachiosaurus the Dodo?
The dodo bird became extinct in the early 1600's. The Triceratops became extinct long before that.
How long before the grevy's zebra is extinct?
Not much longer:( they are being hunt down for there skin and the amazing creature will soon be extinct unless we stop.
When will flies become extinct?
Flies will likely continue to evolve for another 1.1 billion years before extinction. The current species will have gone extinct (replaced with a new species of Fly) long before then.
Did sharks appear when dinosaur extinct?
No. Sharks appeared on earth long before the first dinosaurs did.
Were dinosaurs extinct in the 19th century?
Dinosaurs became extinct millions of years ago. Dinosaurs died off long before humans came into existence.
Can volcanoes extinct?
No. If a volcano erupts then it is not extinct; during its period of inactivity it would have been dormant. To add to this. Two examples are the long-dormant Soufrière Hills volcano on the island of Montserrat, thought to be extinct before activity resumed in 1995 and Fourpeaked Mountain in Alaska, which, before its September 2006 eruption, had not erupted since before 8000 BC and had long been thought to be extinct. I am sure the odds are the same as winning the lottery every year for life.
