There is at least one instance were you can directly account for many extinction by one cause, MAN. As a species we are very adapt at killing everything that we do not value or care enough about. We kill many species a year and also have driven many more to the brink of extinction. Some of which are beyond saving, they are dead animals walking as it were.
There is possibly another example where 1 event possibly lead to a chain reaction which cause the worst extinction event in Earths history, the Permian-Triassic extinction or "The Great Dying".
The theory although controversial explains exactly all the evidence we can see today.
About 251 million years ago it is believed an asteroid about the same size of the Chicxulub Asteroid struck earth just of the coast of Australia. It has been suggested that the shock waves from this asteroid concentrated on the opposite side of the planet at the antipodal point causing a huge volcanic eruption in Siberia, the so called Siberian Traps. Gases from this volcanic eruption caused a large greenhouse effect and warmed the planet.
This increase in temperature in turn stopped the ocean conveyor (a set of currents that circumnavigate the oceans spreading warmth from the equator to the poles and also bringing oxygen to the deep ocean). Once the ocean conveyor had stopped the deep oceans suffered anoxia. This allowed anaerobic bacteria to flourish. One by product of these bacteria is an extremely poisonous gas called Hydrogen Sulphide. This gas was formed in such quantities that it bubbled out of the ocean and killed anything it came in contact with. An example of this anoxic state and hydrogen sulphide making bacteria can be found in Green Lake in New York State.
Most prevalent IMMEDIATE cause of extinction - catastrophies (see catastrophism)
Environmental changes are also a huge factor in extinction, though I wouldn't call them immediate causes for extinction.
Any species can become extinct, given the right conditions; most species do, eventually, die out, but that process can take many millennia.
Black holes, gamma rays, megaquakes, tsunamiis, supervolcanoes, nuclear warfare, artifical intellegence, asteroid strike, diseases but most likely global climate change
Asteroid/Meteor impact, SuperVolcanic Eruptions, Diseases, Wars, Global Warming, Gamma Ray-Burst, Population Decline and Climate Change
DEATH !!
Otters could become extinct but there is a chance they might be recovered.
Gorillas are not extinct yet, but it could happen soon if they are not protected properly.
They could become extinct
Yes.
we could put them in reserves so that they dont all become extinct
it would be very unlikely that huskies (the breed of dog) could become extinct.
There are many different ways that they could of become extinct. No matter what scientists say, nothing is ever certain.
it cant be cos they are many in the universe
yes of course
We might become endangered, but maybe not extinct. The water levels would travel a few hundred miles inland, but we might be able to survive in the cores of the continents. We could also adapt to living in the ocean and build underwater domes.
Dinosaurs were extinct before humans, but as some were meat eaters they could have eaten humans, and if they were around today, they could eat humans, like some animals do.
Hunting, habitat destruction or disease.