A T cell discovery, “hachimoji” DNA, a new species of human, and mounting fears of espionage rounded off the list this year.

Scientists are devising human-animal hybrids for harvesting human organs, but lab-derived mini-organs are a less ethically fraught solution to meeting the need for transplantation.

The researchers aim to grow transplantable human organs from primate embryos.

Many researchers see the move to relax the rules as a welcome change, yet some are worried the revisions don’t take public concerns enough into consideration.

Studying how neural crest cells journey through the embryo, this Caltech developmental biologist has revealed how they form major cell types, including peripheral neurons, bone, and smooth muscle.

Determining which products of advanced biotechnology are deserving of legal protections is essential to our own social architecture.

While the hope is to one day grow organs for transplantation into people, several technical and ethical challenges remain.

Researchers produce functional organs composed of both mouse and rat cells.

Andrzej Tarkowski’s research laid the groundwork for future advances in cloning, stem cell research, and in vitro fertilization.