RESEARCH ARTICLE in SCIENCE:
Synchronizing Rock Clocks of Earth History
K. F. Kuiper, A. Deino, F. J. Hilgen, W. Krijgsman, P. R. Renne, and J. R. Wijbrans (25 April 2008)
Science 320 (5875), 500. [DOI: 10.1126/science.1154339]
Additional commentary from Science Daily:
http://www.sciencedaily.com/releases/2008/04/080424140400.htm
and the Berkeley group:
http://www.berkeley.edu/news/media/releases/2008/04/24_argondating.shtml
