Eternal youth
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Youth_and_Time_1901.jpg/220px-Youth_and_Time_1901.jpg)
John William Godward, 1901
Eternal youth is the concept of human physical immortality free of aging. The youth referred to is usually meant to be in contrast to the depredations of aging, rather than a specific age of the human lifespan.
So far, achieving eternal youth remains beyond the capabilities of science. However, much research is currently being conducted in the sciences of genetics which may allow manipulation of the aging process at some time in the future.
Eternal youth is common in mythology, and it remains a popular theme in fiction.
Mythology
Eternal youth is a characteristic of the inhabitants of Paradise in Abrahamic religion.
The Hindus believe that the Vedic and the post-Vedic richis have attained immortality, which implies the ability to change one's body's age or even shape at will. These are some of the siddhas in Yoga. Markandeya is said to always stay at the age of 16.
The difference between eternal life and the more specific eternal youth is a recurrent theme in Greek and Roman mythology. The mytheme of requesting the boon of immortality from a god, but forgetting to ask for eternal youth appears in the story of Tithonus. A similar theme is found in Ovid regarding the Cumaean Sibyl.
In Norse mythology, Iðunn is described as providing the gods apples that grant them eternal youthfulness in the 13th century Prose Edda.