Shadow life is a theory proposed by Paul Davies, which suggests that life may exist on Earth which has no evolutionary connection with any form of life currently known to science. If shadow life actually exists, this would greatly increase the prior probability of extraterrestrial life developing on other Earth-like planets.
Famous quotes containing the words shadow and/or life:
“But country folks who live beneath
The shadow and the steeple;
The parson and the parson’s wife,
And mostly married people;”
—Arthur Hugh Clough (1819–1861)
“We are all conceived in close prison; in our mothers’ wombs, we are close prisoners all; when we are born, we are born but to the liberty of the house; prisoners still, though within larger walls; and then all our life is but a going out to the place of execution, to death.”
—John Donne (c. 1572–1631)