Posts Tagged ‘John Tarduno’
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A tropical turtle fossil discovered high in the Canadian Arctic suggests that a rapid spike in carbon dioxide some 90 million years ago created a super-greenhouse effect, raising polar temperatures rather dramatically.
U. ROCHESTER (US)—A tropical turtle fossil discovered high in the Canadian Arctic suggests that a rapid spike in carbon dioxide some 90 million years ago created a super-greenhouse effect, raising polar temperatures rather dramatically. The find strongly suggests that animals migrated from Asia to North America not around Alaska, as once thought, but directly across a freshwater sea floating atop the warm, salty Arctic Ocean. Continue…
