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標題: [新聞] 科學家擬復活24種動物 [打印本頁]
作者: vandas    時間: 2013-3-29 11:50 AM     標題: 科學家擬復活24種動物

科學家擬復活24種動物　度度鳥與斑驢上榜！

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▲科學家計畫復活24種動物，其中包括渡度鳥。圖右為佳士得近日打算拍賣度度鳥的骨頭。

英國《每日郵報》網站報導，近日在美國首都華盛頓舉行的TEDx會議上，科學家們探討了用DNA技術讓哪些已滅絕動物「復活」的問題。目前列入討論名單的包括度度鳥(Dodo）和斑驢 Quagga）等24種已滅絕動物。

斑驢曾生活在南非，最後一隻野生斑驢於1870年被槍殺，最後一隻圈養的斑驢於1883年死亡。

度度鳥沒有任何天敵，卻因人類的射殺而滅絕。牠們是只產於印度洋模里西斯島上一種不會飛的鳥。這種鳥在1505年被人類發現後，僅200年時間，即由於人類的捕殺和人類活動的影響，大量減少。約在1660年代前後，徹底絕滅。

度度鳥是人類歷史上第一個被記錄下來、因人類活動而滅絕的生物，也是除恐龍之外最著名的已滅絕動物之一。
研究人員說，由於恐龍DNA過於古老，他們十分確定不會出現現實版的「侏羅紀公園」計畫上。

科學家們在這個由「國家地理會協會」籌畫的會議上，還討論了選擇復活何種動物的一系列標準，例如物種是否有重要的生態功能、是否受人類喜愛等。

他們也探討了復活動物的可行性，如是否有良好的DNA樣本或胚細胞樣本來復活此一物種，以及復活後的物種，能否融入新世界和當時滅絕的原因。復活滅絕動物的成本因動物種類而異。一般需要幾十萬美元。

然而復活已滅絕物種仍面臨一連串技術和道德難題，如科學家如何得到已滅絕動物可用的DNA樣本，以及是否應該這樣做。

美國《華盛頓郵報》報導，10年前，法國與西班牙科學家曾復活了一隻已滅絕的野山羊，但它只活了10分鐘。


Scientists want to bring 24 animals back from extinction (Dodos make the list... but dinosaur DNA is so old, Jurassic Park isn't an option)

Scientists have met to discuss the possibility of bringing back 24 animals back from extinction.
But a real life Jurassic Park is not an option, it is said, because dinosaur DNA is just too old.
The so called 'de-extinction' of a number of species was discussed at a TEDx conference in Washington DC sponsored by National Geographic.

T
he Dodo evolved without any natural predators, but it was forced into extinction by humans who killed them all for food


This extinct species of plains Zebra, the Quagga, once lived in South Africa. The last wild one was shot in 1870 and the last in captivity died in 1883

They included the dodo bird, the Carolina Parakeet, last seen in 1904 in Florida, and the Quagga, a plains zebra which once lived in South Africa.

The last wild onewas shot in 1870 and the last in captivity died in 1883, the Journal reports.

The teams chose the animals using a number of criteria, and discussed the ethics of bringing them back to life.   

They discussed whether the species were desirable, if they held an important ecological function or if they were beloved by humans.

They also discussed if they were practical choices, and if there would be accessto tissue with good quality DNA samples or germ cells in order to reproduce the species.

They also considered whether they are actually able to be reintroduced into the world and what the reasons for extinction were in the first place.

This month’s National Geographic explains how de-extinction works - by taking old DNA samples and reassembling them into a full genome.

This is then injected into embryonic cells which have had their own DNA taken out, and a suitable living surrogate is found to give birth.


The docile, flightless moa stood 12ft high. They died out because of over hunting by the Maori


The Woolly Mammoth, related to the elephant, lived on Wrangel Island in the Arctic Ocean until 4,000 years ago. Scientists can access well-preserved DNA frozen carcasses of the creatures

According to the Washington Post, ten years ago, a team of scientists from France and Spain brought back an extinct wild goat – but it only lived for 10 minutes.

De-extinction does however raise a number of ethical and logistical questions, including how scientists can get a usable DNA sample from an extinct animal, and also whether they should.


The Ivory Billed Woodpecker was last seen in the southeastern United states, but there hasn't been a confirmed sighting of the bird since the 1940s


The Thylacine, or Tasmanian Tiger, is the only marsupial to make the list. It lived in Australia, Tasmania and New Guinea until the 1960s


But dinosaur DNA has long ago degraded, so researchers say they are fairly sure that a real life Jurassic Park will never happen

REAL LIFE JURASSIC PARK 'NOT AN OPTION', SCIENTISTS SAY

In the hit 1993 film, Richard Attenborough hires scientists who use dinosaur DNA taken from a mosquito preserved in amber to clone the animals and create a theme park.

The resulting chaos showed that man and dinosaur should not co-exist.

Last year a controversial Australian billionaire was believed to be drawing up secret plans for a real life Jurassic Park.

Mining magnate Clive Palmer, who has already embarked on a project to rebuild the Titanic, was rumoured to be working with the team who created Dolly the sheep.

It was said the park would be based at Palmer's super resort in Coolum.

But the research has shown the dinosaurs may have to stay on the big screen - as their DNA is just too old to be able to use for de-extinction.

The cost of de-extinction varies by species but it is believed could run into hundreds of thousands of dollars.

It comes after scientists used cloning technology to attempt to bring back a frog from extinction by implanting a 'dead' cell nucleus into a fresh egg from another frog species.

The resulting embryos lived for just a few days.
But the groundbreaking research by the Lazarus Project has brought the 'de-extinction' of creatures like woolly mammoths to the forefront of scientific discussion.

In repeated experiments over five years, the researchers used a laboratory technique known as somatic cell nuclear transfer.

Using a method similar to that imagined in the blockbuster Jurassic Park, they took fresh eggs from the distantly related Great Barred Frog, deactivated their nuclei and replaced them with genes from the extinct frog.

Some of the eggs spontaneously began to divide and grow to early embryo stage – a tiny ball of many living cells from a creature extinct for 30 years.

Although none of the embryos survived beyond a few days, genetic tests confirmed that the dividing cells contain the genetic material from the extinct frog.
作者: chowold2    時間: 2013-3-29 12:38 PM

我們不應浪費金錢用在已經滅絕嘅動物，人應該利用資源去保護其他面臨滅種嘅動物
作者: tvbkk123    時間: 2013-3-29 04:17 PM

我們不應浪費金錢用在已經滅絕嘅動物，人應該利用資源去保護其他面臨滅種嘅動物
chowold2 發表於 2013-3-29 12:38 PM
绝对赞成!几十万美金复活一只可能活不超过十分钟的东西,倒不如做些比较有意义的事情
作者: 麵包和牛奶    時間: 2013-3-29 07:29 PM

親手毀滅然後再親手復活？人類當自己系神?
作者: WuSoLo    時間: 2013-3-30 10:53 AM

親手毀滅然後再親手復活？人類當自己系神?
麵包和牛奶 發表於 2013-3-29 07:29 PM
撇開道德倫理這部份，其實能夠將已滅絕物種「起死回生」在科學和醫學上未嘗不是一件好事。

首先，這證明人類科學某程度上已可憑藉一個細胞／生物活著痕跡去伸延成一個完整生物的可行性，從而「生產」出該物種在消失前的形態，繼而了解該物種之所以消失的源因，進一步明白到如何避免同類事件發生的方法；甚至可以作出修復被人類過度文明所破壞的地球。

再從醫學角度去看，在被「再生」技術成熟後，人類受損害的器官將可以不用倚賴「天然器官」捐贈便可以「人造器官」來移植，對病者也不無壞處。

當然，其中要考慮的事情實在太多，爭議亦都不少；但從表面向內望也不失為有貢獻的研究！
作者: alfredxp    時間: 2013-3-30 02:25 PM

好可怕, 毀滅然後再復活, 是不是叫人做動物...
作者: xbochoy    時間: 2013-3-30 05:01 PM

乜真係好可以復活到咩.. 咁不如復活多d科學家啦 =0="
作者: 10vs1    時間: 2013-4-2 09:18 PM

將來可能復活恐龍....!!
作者: klamb    時間: 2013-4-4 12:50 AM

忘記過去!保護現在我們有的,已經覺得很開心.
作者: lly6620    時間: 2013-4-4 03:21 PM

可以復活已絕種的生物這也代表了科技長足的進步
作者: godtdmzli    時間: 2013-4-4 07:51 PM

不管能不能成功的复活，都能够使人类在基因科学方面取得一些进展吧，不过，自然界的法则就是适者生存，就算有一天人类把所有生物都灭绝掉，只要地球的生命没有受到毁灭性的的影响，经过几千年总能产生新的生命。人类现在有些过分高估自己的能力了。
作者: kht3yt_1wehsj    時間: 2013-4-4 08:28 PM

復活吧,反正沒事讓那些科學家忙著,他們就會想一些有的沒的事,反而地球會更危險
作者: minibus    時間: 2013-4-5 01:07 AM

Pls go ahead, it could help more animals and safe their live
作者: HoNgZ    時間: 2013-4-26 01:49 AM

其实能够让它们复活又怎样？那已经不是天然的生物，可以说是人造的
过去的就让它过去，应该好好照顾现在拥有的，拼不是执着以前的
作者: sduc    時間: 2013-5-3 12:44 AM

really??
作者: klamb    時間: 2013-6-1 06:44 AM

本帖最後由 klamb 於 2013-6-1 07:04 AM 編輯

may 31,2013 新聞...本月一隊俄羅斯和韓國的科學家們發現一個保存完好的冷凍猛獁象屍體，裡面還有血液.又另一類可能重生.




[youtube]p8FflqyPhuI[/youtube]
作者: lly6620    時間: 2013-6-2 10:12 AM

看來科學家還是很想要複製恐龍出來
不怕像電影情節一樣嗎
作者: music0001    時間: 2013-6-8 02:39 PM

如果地球現在的環境不是和他們生活呢？復活的意義到底在於什麼
若是復活之後，這些復活的動物變成強勢物種
總而言之有數不清的問題，如果肯花錢保育現在的動物，是否比較有價值，如：台灣雲豹之類的
作者: hallowin    時間: 2013-6-8 10:15 PM

去既恐龍!
作者: markhamwong    時間: 2013-6-8 10:58 PM

本帖最後由 markhamwong 於 2013-6-8 11:00 PM 編輯
我們不應浪費金錢用在已經滅絕嘅動物，人應該利用資源去保護其他面臨滅種嘅動物
chowold2 發表於 2013-3-29 12:38 PM
完全同意, 神毀滅已經滅絕嘅動物, 這是事實, 為什麼我們不同意.
親手毀滅然後再親手復活？人類當自己系神?
麵包和牛奶 發表於 2013-3-29 07:29 PM
完全同意, 我們只是人類.
人類自毀人類. 這也是事實. 只是時間問題



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