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  • Narrator: As far as supervillains go,

  • Thanos is, well, not very bright.

  • Say what you will about Doc Ock,

  • Syndrome, or Lex Luthor.

  • At least they put considerable

  • scientific thought behind their evil plans.

  • Nanowires feed directly into my cerebellum.

  • Narrator: Meanwhile, check out Thanos' master plan.

  • The entire time I knew Thanos,

  • he only ever had one goal:

  • to bring balance to the universe

  • by wiping out half of all life.

  • Narrator: Yeah, this scheme to conserve resources

  • by eliminating half of all life makes no sense.

  • In fact, it wouldn't save the planet.

  • It would doom it.

  • Let's start with his decision to wipe out half of humanity.

  • Now at first, you can see his reasoning.

  • After all, there are 7.7 billion humans on the planet today.

  • That's nearly 7% of all the people

  • who have ever lived in the history of our species,

  • which makes for a pretty crowded planet.

  • So if half of us suddenly vanished,

  • wouldn't that be a worthy sacrifice?

  • No. Ethics aside, we'd still be left

  • with almost 3.9 billion people,

  • about the same world population in 1972.

  • So if history repeats itself,

  • it would buy us less than 50 years

  • before we reached current levels again,

  • and the same is true for many animal species

  • like deer, whose healthy populations

  • would help them rebound quickly.

  • But unfortunately, the same can't be said

  • for endangered species who have the opposite problem.

  • Take the critically endangered Sumatran tiger, for example.

  • Experts estimate there are fewer

  • than 400 left on the planet.

  • If half disappeared, there wouldn't be

  • enough to sustain the population,

  • and they would likely go extinct,

  • and endangered sharks, hawks, and leopards

  • would probably meet the same fate,

  • and that's where Thanos' plan to save

  • the world really falls apart.

  • Once a top predator disappears,

  • they can take the rest of their ecosystem down with them.

  • Take gray wolves for example.

  • The US government eradicated them

  • from Yellowstone in the 20th century.

  • With the wolves gone, the elk population

  • exploded and devoured the local vegetation,

  • which disrupted the population of

  • beavers, birds, and other species

  • that relied on those plants to survive,

  • and it gets even worse once you consider

  • that half of every plant species on Earth is gone too

  • because just like with animals,

  • there are thousands of endangered plant species,

  • many of which are too vulnerable

  • to survive Thanos' plot,

  • and if plant species die out,

  • the rest of their food chain would starve.

  • Of course, many plant populations aren't endangered,

  • but even that won't save them all in the long run.

  • You see, scientists estimate that 90% of all

  • flowering plants depend on animals to reproduce,

  • but Thanos wiped out half of all

  • bees, fruit bats, and every other pollinator on the planet,

  • many of which are already in trouble.

  • For example, 50% of bee species in the Midwest

  • have vanished in the past century,

  • and the lesser long-nosed bat,

  • a key pollinator in the Sonoran desert,

  • is also disappearing,

  • so they would probably die off completely,

  • and if enough pollinators go poof,

  • we're looking at a possible total ecological collapse.

  • So while Thanos' plan wouldn't

  • directly devastate thriving species,

  • the chain reaction that could come

  • from eliminating endangered species

  • could really mess things up for everyone else left alive.

  • No resurrections this time.

  • Narrator: Nice going, Thanos.

  • To be fair, the planet has experienced

  • mass extinctions before, and life recovered.

  • For example, an asteroid strike 66 million years ago

  • wiped out 75% of all species on Earth,

  • and with the dinosaurs out of the way,

  • our mammalian ancestors flourished.

  • But even so, experts estimate it takes

  • around 20 million to 30 million years

  • to recover from a mass extinction.

  • So unless waiting around for millennia

  • was all part of the plan,

  • the Mad Titan messed up, big time.

Narrator: As far as supervillains go,

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もしもサノスが「アベンジャーズ.インフィニティ・ウォー」のように全生命の50%を抹殺したとしたら?インフィニティ・ウォー (What If Thanos Really Had Eliminated 50% Of All Life, Like In 'Avengers: Infinity War')

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    Ju に公開 2021 年 01 月 14 日
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