Meet Retro, a cloned rhesus monkey born on July 16, 2020. He is now more than 3 years old and is “doing well and growing strong,” according to Falong Lu, one of the authors of a study published in the ...

NEW YORK -- Scientists in Oregon say they've reached the long-sought goal of cloning monkey embryos and extracting stem cells from them, a potentially major step toward doing the same thing in people.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Meet Retro, a ...

He is now more than 3 years old and is “doing well and growing strong,” according to Falong Lu, one of the authors of a study published in the journal Nature Communications Tuesday that describes how ...

(CNN) – The first animal scientists were able to successfully clone Dolly the sheep in 1996. Since then, scientists have cloned other mammals, including pigs, cows, horses and dogs. Tuesday’s issue of ...