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- Path: sparky!uunet!gatech!concert!duke!news.duke.edu!phy.duke.edu!dgt
- From: dgt@phy.duke.edu (Dinko Eduardo Gonzalez)
- Newsgroups: talk.origins
- Subject: Re: Duane T. Gish, Ph. D.
- Keywords: info requested
- Message-ID: <8994@news.duke.edu>
- Date: 23 Jan 93 14:11:04 GMT
- References: <Jan.21.21.49.24.1993.23599@remus.rutgers.edu>
- Sender: news@news.duke.edu
- Organization: Duke University Physics Dept.; Durham, N.C.
- Lines: 31
- Nntp-Posting-Host: physics.phy.duke.edu
-
- Rich Trott writes:
-
- CLAIM #2: "Darwin cited the giraffe as an outstanding example of
- natural selection. Supposedly, as a result of extended droughts, the
- supply of green leaves could be obtained only at the top of the trees,
- and therefore the shorter necked giraffe died off. And the giraffes
- which grew longer necks survived. However, there is no evidence
- whatever in the fossil record or elsewhere that giraffes with short
- necks have ever existed. And what would have happened to young
- giraffes with relatively short necks?"
-
- +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-
- About the fossil record suggesting the existence of short-necked giraffes:
- There are a few extinct animals that resemble giraffes (with shorter
- necks). However, it is tricky sometimes to find fossil evidence of
- "missing links" from what seem to be one species to another. The reason
- is that apparently species may remain unchanged for long periods of time
- , until rigorous conditions allow mutated individuals to survive and
- an evolutionary "step" is taken. Sudden changes in climate or separation
- due to geological changes seem to be percussors of such punctuated evolution.
- Because these changes are sudden and over small periods of time, and due
- to the fact that earthquakes, volcanoes and continental drift change the
- surface of the Earth, these scarce fossils become difficcult to find. Recall
- the case of Archeopterix and Sinornis. Both represent some sort of missing
- link between birds and dinosaurs, but only 3 Archeopterix and 1 Sinornis
- fossils have been found (from presumably millions that lived).
-
- --
- Dinko Gonzalez Trotter
- dgt@phy.duke.edu
-