Famous quotes containing the words single and/or species:
“The pure serene of memory in one man,—
A ripple widening from a single stone
Winding around the waters of the world.”
—Theodore Roethke (1908–1963)
“The question that will decide our destiny is not whether we shall expand into space. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.”
—Freeman Dyson (b. 1923)