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Asked by jeff to Alex, Anaïs, Peter, Sarwat, Shreesha on 11 Mar 2015. This question was also asked by Edward Cowley.
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Alexander Henderson answered on 11 Mar 2015:
There is a widely accepted theory that a large asteroid hit the Earth (present day Gulf of Mexico), which caused the extinction of the dinosaurs. Many animals, some of them very simple, have been around a long long long time.
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Sarwat Iqbal answered on 12 Mar 2015:
The cause of dinosaurs’ extinction is still a mystery, climatic change, diseases, changing plant communities, and geologic events could all have played a role.
There are many types of animals which existed before human being came into existence.
Goblin sharks I think are one of the oldest ones, but there are many others…. -
Peter Maskell answered on 13 Mar 2015:
no one is really sure but the asteriod hitting the earth is the current favourite.
bowhead whale ~200 years old or greenland shark
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Anaïs Pujol answered on 13 Mar 2015:
Since 2006, the oldest animal on earth was the ocean quahog (Arctica islandica). It was 507 years old and was collected close to Iceland coast by scientist and killed by mistake when they tried to open it.
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Shreesha Bhat answered on 13 Mar 2015:
Apart from microorganisms, sea sponges are known to be the oldest animals on earth.
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