16 January 2010
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Q.How old is planet earth
A.The Earth formed 4.5 billion years ago. Stromatolites, the oldest fossils are 3.5 billion years old. The sun formed 4.6 billion years ago.
Q.Which are the most highly evolved and highly intelligent creatures on the planet respectively?
A.Whales are thought to have evolved most, even from terrestrial ungulates at one point (hooved animals). Humans are the most intelligent species.
Q.Wat were the first animals with backbones 2 appear on earth?
A.The first animals with backbones (vertebrates) are believed to have been ostracoderms, fish-like creatures that evolved 500 million years ago.