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Home > Category Index for Science Quotations > Category Index L > Category: Leech

Leech Quotes (6 quotes)

[Reporting after the now infamous 22 Jun 1969 burning of the Cuyahoga River:] Some River! Chocolate-brown, oily, bubbling with subsurface gases, it oozes rather than flows. “Anyone who falls into the Cuyahoga does not drown,” Cleveland’s citizens joke grimly. “He decays” … The Federal Water Pollution Control Administration dryly notes: “The lower Cuyahoga has no visible signs of life, not even low forms such as leeches and sludge worms that usually thrive on wastes.” It is also—literally—a fire hazard.
As reported in Time magazine (1 Aug 1969).
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A skilful leech is better far than half a hundred men of war.
…...
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Leeches should be kept a day before applying them. They should be squeezed to make them eject the contents of their stomachs.
Avicenna
The Canon, Bk IV.
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Nurse, it was I who discovered that leeches have red blood.
(1832). Attributed - on his deathbed when the nurse came to apply leeches. In Barnaby Conrad, Famous Last Words (1961), 78.
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We woke periodically throughout the night to peel off leeches. In the light of the head torch, the ground was a sea of leeches - black, slithering, standing up on one end to sniff the air and heading inexorably our way to feed. Our exposed faces were the main problem, with leeches feeding off our cheeks and becoming entangled in our hair. I developed a fear of finding one feeding in my ear, and that it would become too large to slither out, causing permanent damage.
Kinabalu Escape: The Soldiers’ Story
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Wherever possible, scientists experiment. Which experiments suggest themselves often depends on which theories currently prevail. Scientists are intent of testing those theories to the breaking point. They do not trust what is intuitively obvious. That the Earth is flat was once obvious. That heavy bodies fall faster than light ones was once obvious. That bloodsucking leeches cure most diseases was once obvious. That some people are naturally and by divine decree slaves was once obvious. That there is such a place as the center of the Universe, and that the Earth sits in that exalted spot was once obvious. That there is an absolute standard of rest was once obvious. The truth may be puzzling or counterintuitive. It may contradict deeply held beliefs. Experiment is how we get a handle on it.
In The Demon-Haunted World: Science As A Candle in the Dark (1995), 36.
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Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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