The Variation of Animals and Plants by Charles Darwin
This problem of the conversion of varieties into species,--that is, the augmentation of the slight differences characteristic of varieties into the
greater differences characteristic of species and genera, including the admirable adaptations of each being to its complex organic and inorganic
conditions of life,--has been briefly treated in my 'Origin of Species.' It was there shown that all organic beings, without exception, tend to
increase at so high a ratio, that no district, no station, not even the whole surface of the land or the whole ocean, would hold the progeny of a
single pair after a certain number of generations. The inevitable result is an ever-recurrent Struggle for Existence. It has truly been said that all
nature is at war; the strongest ultimately prevail, the weakest fail; and we well know that myriads of forms have disappeared from the face of the earth.
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What's WRONG with these pictures?
In Florida it's OK to pet and swim with manatees at Crystal River where eco-tourism brings in big bucks for the economy. But in Charlotte and Lee county the manatee is a protected marine mammal and must be given a wide berth. Big fines and stiff jail sentences are the penalty for manatee contact here.
Feeding manatees fresh water from a hose only makes them dependent.