Lifetime extension science, also known as anti-aging medicine, everlasting life extension, fresh gerontology, and biomedical gerontology, will be the study of reducing or reversing the processes of ageing to extend both the maximum and average life-span. Some researchers in this field, life extension believe which future breakthroughs within tissue rejuvenation, stem cells, regenerative treatments, molecular repair, pharmaceutical drugs, and organ alternative will eventually enable humans to have indefinite lifespans.