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Latest Joshua B. Plotkin Stories

New Technique Fills In Fossil Record Gaps
2011-09-20 04:53:20

  University of Pennsylvania evolutionary biologists have resolved a long-standing paleontological problem by reconciling the fossil record of species diversity with modern DNA samples. Cataloging the diversity of life on earth is challenging enough, but when scientists attempt to draw a phylogeny – the branching family tree of a group of species over their evolutionary history – the challenge goes from merely difficult to potentially impossible. The fossil record is...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'