I think you are confusing fossils, where the bone and other structures have become mineralized to preserve shape, with well-preserved bones or other tissues from rather recently deceased organisms such as Neanderthal or Denisova remains found in caves, or Mammoth and Mastadon remains found in permafrost. There is no intact DNA or protein in fossils. Many years ago someone claimed to have found some collagen in fossil bone but it turned out to be contamination of modern protein on the surface of the fossil.

Even with the Neanderthal or Mastadon DNA, the material is quite degraded and only short read lengths are possible. This is a very very different thing than taking an intact live nucleus with intact chromosomes from living cells of one mammal and injecting it into the live egg of another living individual of the same species (such as Dolly the sheep). If it were easy, someone by now would have cloned a mammoth or mastadon using an elephant as the mother.

I think you are confusing fossils, where the bone and other structures have become mineralized to preserve shape, with well-preserved bones or other tissues from rather recently deceased organisms such as Neanderthal or Denisova remains found in caves, or Mammoth and Mastadon remains found in permafrost. There is no intact DNA or protein in fossils. Many years ago someone claimed to have found some collagen in fossil bone but it turned out to be contamination of modern protein on the surface of the fossil.

Even with the Neanderthal or Mastadon DNA, the material is quite degraded and only short read lengths are possible. This is a very very different thing than taking an intact live nucleus with intact chromosomes from living cells of one mammal and injecting it into the live egg of another living individual of the same species (such as Dolly the sheep). If it were easy, someone by now would have cloned a mammoth or mastadon using an elephant as the mother.

Hi there,

It is not about cloning here (which requires a living cell/nucleus) but about reanimating an extinguished specie... Only cinema is able to do so.

Dear Vaishnavi Bade,

Please have a look at these useful links for answer to this question.

Article Revival of Extinct Species Using Nuclear Transfer: Hope for ...

Article The potential and pitfalls of de-extinction

Article The Extinction and De-Extinction of Species

https://www.quora.com/Which-extinct-animals-have-been-brought-back-by-cloning

https://www.quora.com/Which-extinct-animal-is-the-closest-to-cloning-and-rebirth

Good luck!

Sir,I did’nt mean to say only about cloning of dinosaurs,but I have asked about regenerating any species that are extint.

You have mentioned that regenerating of extint species is possible only in cinemas but there was an organism named Pyrenean ibex (Capra pyrenaica pyrenaica), a wild goat which was extinct in 2000 and it was regenerated.

Dominique Liger