Contact: Hannah Hickey
University of Washington
Caption: This image shows a magnified cross-section of a shell. The lines in the outer layer come from growth during low tides, and help to put a time on the temperature measurements.
Credit: M. Carré / Univ. of Montpellier
Usage Restrictions: With credit
Related news release: Ancient shellfish remains rewrite 10,000-year history of El Nino cycles