| http://www.w3.org/ns/prov#value | - ? The Pleistocene Ice Age began about 2.6 million years ago, and the latest interglacial period began about twelve thousand years ago (kya).??? As life on Earth evolved, complicated and diverse ecosystems developed.??? Bacteria and other microscopic organisms led to complex plants and animals, and biology became increasingly ???sophisticated.?????? Fish evolved more complicated and sophisticated
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