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    There have been many periods of natural climate variability over those 300 million years, and still the pattern held steady, with an average of 64 percent of species pairs with significant
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    Add all of us up, all 7 billion human beings on earth, and clumped together we weigh roughly 750 billion pounds That, says Harvard biologist E O Wilson, is more than 100 times the biomass of any
  • Scientific American Blog Network
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    Early caught dunlins were grouped according to fat score in one of two classes, ‘fat’ (fat score ≥3) or ‘lean’ (fat score <3) to check for any possible effect of body condition on the birds’ orientation performance where lean birds were expected to perform reverse migration and fat birds selecting directions towards the expected
  • What is Bycatch? Understanding and Preventing Fishing Bycatch
    Bycatch mortalities can often be reduced by modifying fishing gear so that fewer non-target species are caught or so that non-target species can escape In many cases, these modifications are simple and inexpensive WWF created the International Smart Gear Competition to promote the development of such innovative technology WWF offers more
  • Pennsylvania Code Bulletin
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  • Bringing Fossils To Life: An Introduction To Paleobiology . . .
    No matter how one does this calculation, it is clear that the quarter of a million species known as fossils represents only a tiny fraction of a percent of all species that have ever lived But all is not lost Almost half of the 1 5 million described species are insects, which have a poor fossil record





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