<unk>  is the concept of extending the human<unk> span, either modestly through improvements in medicine or dramatically by increasing the maximum<unk> span beyond its generally-settled limit of 125 years. Several researchers in the area, along with<unk> ists", "immortalists" or "longevists" (those who wish to achieve longer lives themselves), postulate that future breakthroughs in tissue rejuvenation, stem cells, regenerative medicine, molecular repair, gene therapy, pharmaceuticals and organ replacement (such as with artificial organs or xenotransplantations) will eventually enable humans to have indefinite<unk> spans (agerasia) through complete rejuvenation to a healthy youthful condition. The ethical ramifications, if<unk>  becomes a possibility, are debated by bioethicists. The sale of purported anti-aging products such as supplements and hormone replacement is a lucrative global industry. For example, the industry that promotes the use of hormones as a treatment for consumers to slow or reverse the aging process in the US market generated about $50 billion of revenue a year in 2009. The use of such hormone products, however, has not been proven to be effective or safe.
Life extension
Sex selection
Longevity
Stop the Spread
Neurodiversity
Biological globalization
Honeycombing
Introduction to viruses