They're tiny, blobby, butt-shaped, and glow in the dark. What the heck are they? Scientists are still figuring them out.

Surgeon Muhammad Mansoor Mohiuddin is a leader in the novel field of xenotransplantation—transferring organs from one species to another—in his case, from pigs to humans.

This story appears in the April 2014 issue of National Geographic magazine ... a muntjac deer (originally from Asia), a potbellied pig, a raccoon-like kinkajou called Kiwi, and a dog named ...

My journalist-as-guinea-pig experiment is taking a disturbing ... The tests are too expensive for most individuals—National Geographic paid for mine, which would normally cost around $15,000 ...

National Geographic has named the top 10 best hotels in the Cotswolds, including a "quintessential" Oxfordshire country pub.