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  • Will our science fiction future

  • include the prehistoric past?

  • We're all familiar with the story of Jurassic Park. The eccentric billionaire pays a bunch

  • of scientists to genetically resurrect dinosaurs for his amusement park and hilarity ensues.

  • So, how realistic is this scenario?

  • Well, for dinosaurs, the sad answer is not very realistic, because DNA degrades over

  • time. Dinosaurs lived millions of years ago. So being able to sequence the genome of a

  • dinosaur looks to be impossible.

  • Even with the mosquito in amber scenario.

  • But the same is not necessarily true for animals that went extinct more recently, like in the

  • last ten thousand years or so.

  • In fact, it's not just a hypothesis, scientists are working on it right now.

  • Back in 2003, a team of scientists attempted to clone a bucardo, which is an extinct animal

  • that's similar to a goat.

  • They harvested nuclei out of bucardo cells, and then they put that into empty goat egg

  • cells and then into goat surrogate mothers.

  • After several attempts, they had a live bucardo delivered by c-section.

  • Sadly, it only lived a few minutes. But it laid the ground work for the future.

  • And since then, techniques and technologies have improved and scientists are now on the

  • verge of being able to bring back several extinct species.

  • And they don't necessarily need a viable cell to do it.

  • Another approach is create a chimera, which is an animal that, on the outside, resembles

  • one species, and on the inside resembles another.

  • This is how scientists plan to bring back the passenger pigeon. They're going to reconstruct

  • passenger pigeon DNA, and inject it into band-tailed pigeon eggs.

  • Now the hatchlings are going to look like band-tailed pigeons. They're going to act

  • like band-tailed pigeons. But they're going to have the reproductive cells of passenger

  • pigeons.

  • So if you breed two of these altered band-tailed pigeons together...

  • BAM! You've got passenger pigeons!

  • Now the question is - is this a good idea?

  • I would love to see flocks of passenger pigeons flying around, or even a woolly mammoth walking

  • by. How cool would that be?

  • But some people are a little worried that this de-extinction technology could lead to

  • less importance placed on conservation.

  • Why should we spend money and effort conserving a species, if we can just bring them back

  • from the dead, should they go extinct?

  • Now using this same sort of flawed logic you could see people decide to exploit the environment

  • even more than we already are.

  • And another drawback is that some extinct species may not be able to survive in today's

  • ecosystems.

  • And it hardly seems fair to bring a species back from the dead, just for it to go extinct

  • again.

  • But this doesn't mean de-extinction technology is a bad idea. It's actually an amazing idea!

  • For one thing, it can help us bring endangered species back from the brink of extinction

  • by increasing biodiversity in these small populations.

  • And who knows, maybe the reason why traffic is so bad in the morning is because the woolly

  • mammoth crossing is particularly busy today.

  • Now that leads me to a question for all of you this week.

  • If you could bring one species back from extinction, which one would it be and why?

  • Let us know in the comments below.

  • And if you enjoyed this video, please share it with your friends and hit that little 'like'

  • button and subscribe to our channel.

  • And then treat yourself. Watch one of these videos over here. You're gonna love it.

Will our science fiction future


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B2 中上級

絶滅した動物が生き返る? (Extinct Animals Brought Back to LIFE?!)

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    羅致 に公開 2021 年 01 月 14 日