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  • Ah, the planet Earth, our beautiful home.

  • We'd like to believe it will be around

  • forever, but what if it isn't?

  • Aliens, comets, weapons of

  • mass destruction, black holes,

  • even the Sun could destroy the Earth.

  • In July of 2019, we had a narrow miss

  • with asteroid 2019 OK.

  • It's impact would have been similar

  • to a nuclear bomb.

  • And the scariest thing?

  • Scientists didn't see it coming until

  • it was too late.

  • NASA would need a whole year's notice

  • to stop a doomsday collision.

  • How would they do that?

  • They'd launch an object into space

  • to collide with the asteroid,

  • destroying it before it got close to Earth.

  • Barring any more immediate dangers,

  • Earth wasn't always the diverse paradise

  • we know it as.

  • In fact, about 4 billion years ago,

  • it looked more like something from

  • a sci-fi movie.

  • Supervolcanoes, meteors, and a toxic

  • atmosphere made our planet inhospitable.

  • So how did it become today's Earth?

  • It went through many geological,

  • atmospheric and evolutionary steps.

  • In fact, Homo sapiens only came into the story

  • Human life evolved during a time when

  • the climate was mild and stable,

  • enabling a vast diversity of life -

  • something we take for granted.

  • Today, we are already beginning to see

  • the effects of rapid changes to our

  • climate and the destruction it causes.

  • How will it affect your children?

  • That may not seem like a lot, but it is

  • enough to create droughts,

  • extreme wildfires,

  • stronger hurricanes,

  • and food shortages.

  • Two hundred years into the future,

  • Hopefully, we spend all that time

  • between now and then creating new

  • technology to offset the environmental

  • destruction and keep up with the

  • demand for food.

  • In 300 years,

  • which means we use all the available

  • resources on our planet.

  • If only we could get to Type II and use the

  • power of the Sun, or even Type III,

  • which uses galactic power.

  • These are things that could affect your

  • direct descendants. But let's jump even

  • further into the future, when humans

  • may or may not even be around.

  • In 100,000 years from now, the biggest star

  • in the Milky Way, Canis Majoris, will explode.

  • The supernova will be visible from Earth

  • in pure daylight.

  • As this is going on, 20 supervolcanoes

  • will spew out 417 km³ (100 mi³)

  • of magma in all directions.

  • At this point, Earth will be starting to

  • resemble the planet we saw 4 billion years ago.

  • In 600 million years, the Sun will begin to

  • burn up the Earth, as the Sun gets

  • hotter from its shrinking core.

  • The only life left on Earth 800 million years

  • into the future will, once again, be

  • And 2.8 billion years into the future,

  • There will be no life left on Earth.

  • Can we stop this slow demise into a piece

  • of lifeless rock?

  • Probably not.

  • In fact, our current actions might

  • even be speeding up the process.

  • Instead, we could work towards prolonging

  • this calm period in Earth's history

  • by protecting its life-sustaining ecosystems

  • and using renewable resources.

  • The end of the Earth has captured

  • many people's imaginations.

  • There are even doomsday groups with specific

  • theories on how the end will come.

  • Some people believe that aliens will

  • show up and wipe us out, maybe

  • because of our rich natural resources,

  • or maybe they just won't like us.

  • Other people believe that we will be sucked

  • into a planet-destroying black hole

  • caused by the Large Hadron Collider.

  • Oh, and don't forget deathly

  • gamma-ray bursts, which can produce as

  • much energy in one millisecond as the

  • Sun does in its entire lifetime.

  • What about us?

  • Can we destroy the Earth with weapons

  • of mass destruction?

  • Luckily, no.

  • We might be able to wipe humanity out,

  • but to physically destroy the Earth

  • is not possible.

  • The most powerful explosive device

  • detonated - so far- is the Soviet-built

  • Tsar Bomba, also called Big Ivan.

  • The 50 megaton hydrogen bomb detonated

  • in 1961 in the Arctic, was over 3,000 times

  • more powerful than the bomb that

  • destroyed Hiroshima.

  • to obliterate the Earth.

  • In the long term, the Earth will eventually die.

  • But hopefully we can fend of any immediate

  • disasters, and use that time to figure out a way

  • to continue our existance through

  • technological and biological advances.

  • How would the human race react to news

  • that the Earth, like any living organism,

  • is on its way toward the great beyond?

  • Would it divide or unify us?

  • Even though the Earth will die - whether that's

  • sooner or later - we can make it a better

  • place while we're here.

  • For now, this is all we've got.

  • So let's take better care of the environment,

  • maybe stay away from weapons of mass

  • destruction, we don't want to risk a

  • World War III...

Ah, the planet Earth, our beautiful home.

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B1 中級

如果我們知道地球死亡的時間呢? (What If We Knew the Time the Earth Will Die?)

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    林宜悉 發佈於 2021 年 01 月 14 日
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