Clones are as much a sci-fi staple as robots, spaceships, and time travel, with every major franchise dabbling with duplicates somewhere down the line. The idea of a character meeting their reflection ...

When Dolly the sheep—the first cloned mammal—was born 30 years ago, she became one of the most famous animals in science history. Her arrival sparked predictions of a sci-fi future filled with cloned ...

Countless scientists and at least a dozen high-concept sci-fi comedies over the past 30 years have speculated on the potentially degrading effect of making clones out of other clones, ad infinitum.

Sixteen years ago Dr. Scudworth and his evil scientist friends collaborated to make the first group of famous human clones. But first, they had to create Mr. Sheepman, a “partially human” clone and ...