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Giant boid snake from the Palaeocene neotropics reveals hotter past equatorial temperatures. Head, Jason J. 1; Bloch, Jonathan I. 2; Hastings, Alexander K. 2; Bourque, Jason R. 2; Cadena, Edwin A. 2,3; Herrera, Fabiany A. 2,3; Polly, David P. 4; Jaramillo, Carlos A. 3 [Letter] Nature. 457(7230):715-717, February 5, 2009.
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