Induced pluripotent stem cells
iPS cells are a kind of adult stem cell. They are made from cells from the bodies of adults. This is different to embryonic stem cells which are taken from human embryos. Yamanaka's lab was able to take ordinary body cells, and make them become pluripotent. Being pluripotent means that they can become any other kind of cell.  In other words, they can become any kind of cell like embryonic stem cells, but do not need to be taken from human embryos.