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  • With devastating hurricanes, refugee crisis

  • and the real possibility of nuclear war. It can sometimes

  • feel like the end is near. But what are the biggest threats

  • to humanity and is there anything we can do to stop them?

  • Experts all over the world from the Global Challenges Foundation

  • in Stockholm and the Centre for the Study of Existential Risk

  • at the University of Cambridge consider this question yearly

  • using scientific research. Some risks lay

  • millions of years into the future like gamma-ray burst

  • caused by a star explosion which would destroy our

  • ozone layer or even the over expansion or

  • collapse of the entire universe. Closer to home

  • we have our sun which will eventually become a red giant as it ages

  • and engulf the entire planet

  • but even that isn't for another 5 billion years.

  • More imminent is an asteroid large enough to

  • create a global catastrophe which is estimated to occur

  • every 120,000 years. While none are currently

  • expected to hit earth soon existing data is incomplete

  • with a worldwide effort underway to

  • to search the skies. Should it happen

  • it could create a global cooling event like the ice age.

  • But even smaller asteroids could have a significant impact

  • on both natural and human ecosystems too.

  • An even closer possibility is the super volcano

  • the devastation in Pompeii from Mount Vesuvius released around

  • 4 km cubic of magma but the super volcanos

  • can release more than 500 km cubic.

  • The real worry from this worldwide is

  • the ash cloud which would block out the sunlight, cooling the globe

  • and crippling agriculture. The last known eruption occurred

  • around 25.000 years ago in New Zealand and

  • researchers predict they occur every 30.000 to 50.000 years.

  • Scientists are currently monitoring Yellowstone

  • in the US as a future potential site. But not

  • all of our threats are natural. Overpopulation can

  • outstrip Earth's capacity to produce food

  • and other resources. And amplify the threat of infectious

  • pandemics due to high densities. Perhaps with bioengineered

  • diseases. Conversely evidence is

  • already pointing to declining fertility rates.

  • Will we see the human population gradually die off

  • from lack of births? Or will climate change beat this concern?

  • A rise of 3 degrees Celsius would be incredibly

  • significant with most of Florida and Bangladesh underwater.

  • While several coastal cities would become swamped.

  • On top of this longer and more damaging wild fire seasons,

  • more destructive hurricanes, heat waves, food insecurity

  • and drought. All of which can impact and amplify

  • incidents of violence with. Nations already suffering

  • from water and climate conditions which ultimately

  • impacted deteriorating economic conditions.

  • Then, there is nuclear war. Tensions over North Korea have brought this conflict to the forefront.

  • With over 7000 known warheads between Russia and the US.

  • And nukes within the UK, France

  • China, India, Pakistan, Israel and North Korea.

  • The doomsday clock created by the

  • Bulletin of Atomic Scientists represents the likeliness of a

  • man-made global catastrophe. Though the clock more recently

  • included climate change and some other developments that

  • put humanity at risk emphasis is placed on nuclear war.

  • Since its creation in 1947, the furthest

  • we've been from midnight or doomsday is in 1991

  • when the clock was 17 minutes to midnight.

  • Today in 2017 the clock sits

  • at 2.5 minutes to midnight. The second closest it has ever been.

  • Even a small nuclear war

  • could create a nuclear winter which would cause global cooling

  • and damage to the ozone layer that may ultimately

  • create droughts that lasts more than a decade.

  • But the greatest threat of all: Researches currently believe

  • it's artificial intelligence. If growth continues to

  • become comparable to the industrial and agricultural revolutions

  • Experts predict autonomous machines will attain

  • near human level intelligence by 2075.

  • And even if these machines don't become malevolent or evil

  • what happens if those programmed to kill fall into the

  • wrong hands? Or when AI programmed to do something good

  • go about it with a destructive method?

  • Thank you all so much for watching this video! If you liked it

  • make sure that you subscribe so that you can see our videos that come out every Thursday.

  • And we're gonna like some other videos over there that are similar to this one.

  • About how rich people are prepping for the apocalypse and

  • how to survive a nuclear war. This year is almost over. Hang in there!

  • Peace guys!

With devastating hurricanes, refugee crisis

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    kiki に公開 2020 年 08 月 06 日
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