A black-footed ferret has been cloned, a first for a U.S. endangered species
A black-footed ferret that died more than 30 years ago has been cloned using preserved cells, which could help inject diversity into the inbred, endangered population.
3-ton parts of Stonehenge may have been carried from earlier monuments
Years of archaeological research now suggest that Neolithic Britons lugged massive elements of the iconic monument from far-flung reaches of the island.