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Article: NSF: Large gene study questions Cambrian Explosion theory.
- Article from:
- M2 Presswire
- Article date:
- January 21, 1999
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M2 PRESSWIRE-21 January 1999-NSF: Large gene study questions Cambrian Explosion theory (C)1994-99 M2 COMMUNICATIONS LTD
RDATE:220199
The ancestors of major groups of animal species began populating Earth more than 600 million years earlier than indicated by their fossil remains, according to the largest study ever on the subject using gene sequences. The recently completed study at Penn State University, funded in part by NSF, suggests that animals have been evolving steadily into different species for at least 1200 million years -- which challenges a popular theory known as the Cambrian Explosion that proposes the sudden appearance of most major animal ...