The biblical story of Noah's Ark has a humanitarian and educational purpose. It is there to teach us that we should show respect to mother earth by protecting all species on the planet from disaster that may lead to their extinction. One of the key aspects of this endeavor is to strive to preserve animal fertility. Two disciplines work in tandem to facilitate this goal - biotechnology of reproduction and cryobiology. This book reviews various achievements in this field and discusses emerging technologies in cryopreservation of gametes, embryos, and gonads of humans and domestic, laboratory and wild animals.