Ordovician%e2%80%93silurian Extinction Event

Famous quotes containing the words extinction and/or event:

    I wish all men to be free. I wish the material prosperity of the already free which I feel sure the extinction of slavery would bring.
    Abraham Lincoln (1809–1865)

    ... every event has had its cause, and nothing, not the least wind that blows, is accident or causeless. To understand what happens now one must find the cause, which may be very long ago in its beginning, but is surely there, and therefore a knowledge of history as detailed as possible is essential if we are to comprehend the past and be prepared for the future.
    Pearl S. Buck (1892–1973)