
The SciencesJanuary 1, 2002
The First Human Cloned Embryo
Cloned early-stage human embryos--and human embryos generated only from eggs, in a process called parthenogenesis--now put therapeutic cloning within reach

The First Human Cloned Embryo
Cloned early-stage human embryos--and human embryos generated only from eggs, in a process called parthenogenesis--now put therapeutic cloning within reach

Xenotransplantation
After struggling for decades with a shortage of donated organs from cadavers, transplant surgeons may soon have another source to tap