It's hard to drum up sympathy for vultures. They do, after all, feast on the carcasses of dead (and diseased) animals. But at the International Centre for Birds of Prey in the UK, conservationists are hoping to keep extinction at bay for one African species by 3D printing vulture eggs. The replicas, which are made to simulate the same shape, weight and feel of actual vulture eggs, pack sensors inside (kinda like a Kinder surprise egg, except not at all) to gather data on the complicated incubation process. Wired reports that researchers at the ICBP have already begun testing these faux eggs on captive vultures to cull temperature, humidity, barometric pressure, carbon dioxide, light and rotation data -- all transmitted wirelessly -- for its captive breeding program.