I like to define biology as the history of the earth and all its life - past, present, and future.
For mankind as a whole, a possession infinitely more valuable than individual life is our genetic heritage, our link with past and future... Yet genetic deterioration through man-made agents is the menace of our time.
In its mysterious past it encompasses all the dim origins of life and receives in the end, after, it may be, many transmutations, the dead husks of that same life. For all at last return to the sea - to Oceanus, the ocean river, like the ever-flowing stream of time, the beginning and the end.
I like to define biology as the history of the earth and all its life - past, present, and future. To understand biology is to understand that all life is linked to the earth from which it came; it is to understand that the stream of life, flowing out of the dim past into the uncertain future, is in reality a unified force, though composed of an infinite number and variety of separate lives.
To understand the living present, and the promise of the future, it is necessary to remember the past.
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