Sharks have ruled the Earth’s oceans for 400 million years and recent research on fossilized shark teeth has led to the ...
Our work provides a more precise date. During the Great American Biotic Interchange, animals from the north (depicted in green) migrated south, while animals from the south (depicted in blue ...
Our revised age calibrations coincide with global events, including major sea-level fluctuations and the Great American Biotic Interchange – the migration of land mammals between North and South ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果