Scientists have reported the first live birth of a “chimeric” monkey with stem cells taken from two embryos. The embryos come from the same species of monkey – a crab-eating macaque – but are ...

Human embryo development and early organ formation remain largely unexplored due to ethical issues surrounding the use of embryos for research as well as limited availability of materials to study.

Paleontologists operating CT scanners have revealed the structure of a 20-million-year-old primate brain, thanks to an extremely well-preserved fossil skull. Understanding the evolution of our wildly ...