When did animal life begin to appear in the oceans?

Answer 1

480 million and 472 million years ago, during the early part of a period known as the Ordovician, according to recent research.

We can draw reasonable conclusions from what we see, but we could still be in error if we miss important evidence or interpret something incorrectly. Theories and discoveries keep emerging and even changing!

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Answer 2

Lydia Allen

Around 600 million years ago, during the Ediacaran Period, animal life first appeared in the oceans. However, during the Cambrian Period, which started about 541 million years ago, animal life underwent significant diversification.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.