March 17, 2013

Video: Scientists try to bring extinct species back to life

It's been gone since 1983, but the Lazarus Project has brought it back to life.

In 1983, the world lost one of its weirdest frogs. The gastric-brooding frog, native to tiny portions of Queensland, Australia, gave birth through its mouth, the only frog to do so (in fact, very few other animals in the entire animal kingdom do this--it's mostly this frog and a few fish). It succumbed to extinction due to mostly non-human-related causes--parasites, loss of habitat, invasive weeds, a particular kind of fungus. There were two subspecies, the northern and souther gastric-brooding frog, and they both became extinct in the mid-80s sometime.

Except--what if they didn't?

Taking place at the University of Newcastle, the quest to revive the gastric-brooding frog became known as the Lazarus Project. Using somatic-cell nuclear transfer (SCNT), a method for cloning, the project has achieved the major step forward of creating an early embryo of the extinct frog. Essentially, they found a related frog--the great barred frog, which also lives in Queensland and has cool eye markings, like it's wearing sunglasses--deactivated its eggs, and replaced them with eggs taken from the extinct frog.

Even though the gastric-brooding frog has been extinct for decades, it's possible to do this because individual specimens were kept preserved in, believe it or not, everyday deep freezers. When going through somatic-cell nuclear transfer, the eggs began to divide and form into the early embryo stage.


The embryos didn't survive much longer than that, but it was confirmed that these embryos contain genetic information from the gastric-brooding frog--that yes, in fact, they have brought it back to life. The researchers are confident that this is a "technical, not biological" problem at this stage to breed gastric-brooding frogs to adulthood. This is a big step forward for the worldwide attempts to revive extinct animals--the Lazarus Project researchers will soon meet with those working to revive the woolly mammoth, dodo, and other extinct beasties to share what they've learned.


Oh, and in case you were wondering: the gastric-brooding frog lays eggs, which are coated in a substance called prostaglandin. This substance causes the frog to stop producing gastric acid in its stomach, thus making the frog's stomach a very nice place for eggs to be. So the frog swallows the eggs, incubates them in her gut, and when they hatch, the baby frogs crawl out her mouth. How delightfully weird!
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Responses to "Scientists Resurrect Bonkers Extinct Frog That Gives Birth Through Its Mouth"

  1. Sharon Thomas says:

    Sounds neat,but I don't know about this playing god thing it will back fire some where and it will not be a good thing:

  2. Bringing the Woolly Mammoth and Dodo is going to prove difficult due to the fact of habitat loss and there variety in foods that they ate are also extinct. plus the Woolly Mammoth to be born would be difficult due to the size of the creature. African Elephants are the last large elephants in the world, If one was to birth a Mammoth it would prove devastating. And although the pigeon is the relative to the Dodo how are you going to hatch one unless you use Ostrich or Emu eggs to do so. Leave the beasties alone.

  3. Anonymous says:

    Okay wev'e all seen Jurrasic park..so lets that in mind will we..when we decide what to bring back...i am sure flying terradactyls aren't appropriate...the pelicans pick up the minitature puppies .....lets leave it at that!

  4. Morgana says:

    So strange so outstanding.

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