SCIENCE
Megaherbivore extinctions in Africa
...Megaherbivores (for example, elephants... began to decline about 4.6 million years ago, megaherbivore decline may have been triggered by declining atmospheric carbon dioxide and expansion of grasslands.
Megaherbivore extinctions in Africa
...Megaherbivores (for example, elephants... began to decline about 4.6 million years ago, megaherbivore decline may have been triggered by declining atmospheric carbon dioxide and expansion of grasslands.
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