When did animal life begin on earth?

Answer 1

Earlier than 650 million years ago (mya)

For my essay "10 Esoteric Science about Universe and Creation" in my book "Faiths and Proximate Truths (2010), I had gathered the information below for the endnotes (p. 155);

Evolution from unicellular to multicellular organisms occurred between 2 and 600 million years ago (mya).

650 million years of sea life.

Worms bearing legs: 570 mya.

Sea animal migration to land: 400–385 mya.

Algae: 359–299 mya.

Dinosaurs with small wings: 160 mya.

Flying squirrels: 125 million years ago.

Bats: fifty million years ago.

Anthropoid: (human-looking)

Germanian female Ida: 47 mya.

Asia's Ganea megacanina: 39 mya.

Lucy was 3,2 mya and Hominid Ardi was 4.4 mya (Africa)

They are all 2-sd and 3-sd approximations, with million years as the unit of time; readers are welcome to update these data for corrections and omissions, if any.

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Answer 2

During the Ediacaran period of the Neoproterozoic era, approximately 600 million years ago, animal life first emerged on Earth.

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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.

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.

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.

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.

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