How will the world end? Six terrifying ways humanity could be destroyed

THERE have been several "mass extinctions" throughout history which almost wiped out life on earth.

Scientists fear humanity could be destroyed during one of these devastating events.

Now, there's no reason to be afraid of a wild piece of online gossip which suggests a mysterious planet called Nibiru will whack into us this weekend. 

But there are plenty of more realistic threats to the future of our species.

If we manage to avoid destroying ourselves in a nuclear war or committing collective hari-kari by unleashing deadly manmade viruses, there are several ways our species could face its doom.

Our planet has already seen some of its most successful species wiped out following spectacular disasters like the asteroid crash that killed the dinosaurs.

The worst of these mass extinctions is called The Great Dying and resulted in the destruction of 96 percent of life on Earth.

Could the same happen to us? Read on to hear about the greatest threats to our species.

1. Deadly asteroid impact

A massive meteorite wiped out the dinos - and we could face exactly the same fate.

Hundreds of asteroids pass perilously close to us every year, but most speed past without hitting Earth.

But if one was to be thrown out of kilter on its travels, its path may be altered and it could be forced straight into the surface of our planet.

There have been many close shaves in the past and even some small-scale asteroid disasters in living memory.

A meteor that exploded in the atmosphere over Siberia in 2013 injured some 1,600 people.

If it had been just a little bit bigger, the whole city would have been wiped out.

Just imagine what would happen if a truly gigantic asteroid hit us.

2. Nuclear war

Some fear that a nuclear war is more likely to happen now than at any other point of history since the end of the Cold War.

Atomic tensions are running extremely high since North Korean dictator Kim Jong-un claimed he has the ability to hit New York with nuclear weapons.

The tubby tyrant has spent years publishing pugnacious propaganda which shows bombs dropping on the Statue of Liberty.

President Donald Trump is now locked in a war of words with North Korea after it flexed its muscles in an unprovoked missile test that saw it fire a missile directly over Japan.

If Trump follows up on the warning that he would retaliate with "fire and fury" if North Korea threatens US territories, we could be in a pretty hairy situation.

Modern nuclear weapons are terrifyingly powerful.

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The largest bomb ever designed, the Russian Tsar Bomba, would wipe out everyone within 2 miles of the area and then leave a contaminated wasteland spreading five miles either way from the impact zone.

About 90 percent of the people in this disaster zone would die, with many suffering lingering deaths from radiation or extreme burns from the blast.

If there is a nuclear war, there is little chance humanity would survive.

3. Methane bursts from the seabed

This is the least glamorous of the potential apocalypse options, but it could be the most likely.

Methane gas expulsion is one of the theories put forward by scientists to explain the Great Dying, which took the Earth ten million years to recover from.

It's believed the slow production of methane over millions of years produced greenhouse effect that graducal turned the planet into a desert.

If it were to happen again, it could raise temperatures from today's average of 16°C to above 30°C.

This would melt the icecaps, flood all our major cities and change the world so dramatically that it would be impossible for humanity to survive.

Worryingly, some scientists believe the melting of permafrost in Siberia is already causing methane to bubble out of the ground.