Tiny “living machines” made of frog cells can replicate themselves, making copies that can then go on to do the same. This newly described form of renewal offers insights into how to design biological ...

ABOVE: Ada Calvin, 7, plays with a toy frog and a bubble machine Monday at Speckled Frog Toys & Books. Shelly Cassiday-Riesenmy and her daughter Erin Babb opened the toy store about a month ago.

Michael Levin, a biologist at Tufts University, spends his days doing things such as coaxing flatworms to grow two heads or helping frogs regenerate lost legs. It may not seem like it, he says, but ...

What happens when you take cells from frog embryos and grow them into new organisms that were "evolved" by algorithms? You get something that researchers are calling the world's first "living machine.