When did life originate on Earth?

1 Answer
Sep 30, 2016

Answer:

See explanation.

Explanation:

Some scientific surmises;

First whiff of oxygen: 3.2 billion years ago (bya)

Unicellular life: 2 bya

Unicellular # to # multicellular evolution: less than 2 bya

Sea life: 650 million years ago (mya)

Leg-bearing worms:570 mya

Wattizea tree:380 mya

Animal movement from land to sea:400-365 mya

Insects:359-299 mya

Mini-winged dinosaurs:160 mya

Bates:50 mya

Anthropoid (resembling human )primate Ida (female): 47 mya

Indubitably, you and I: Now.: