Unscrambling time in the fossil record
Article Abstract:
Scientists have used a combination of two dating techniques to produce a record of a land-snail's 15,000-year-long campaign to invade and hybridize the native snail species on Great Inagua in the Bahamas. A single bed of snail shells provided the fossil record of the evolutionary shift.
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1996
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Did Darwin get it all right?
Article Abstract:
Paleontologists have completed a study on the fossil remains that disputes the theory that a species changes gradually over a long period of time before a new species evolves. The study on bryosoa provides strong support for punctuated equilibrium in speciation.
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1995
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Does evolutionary history take million-year breaks?
Article Abstract:
Some paleontologists have proposed a concept called coordinated stasis in which entire communities of marine animals stop evolving for millions of years. Results of fossil studies on the concept are mixed.
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1997
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