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3.5 billion years ago is the oldest direct evidence for life on Earth. Direct evidence is found in 3.5-billion-year-old cherts (rocks deposited in the ocean) in which several microorganisms have been identified. These microogranisms are much like cyanobacteria which is found in abundance throughout the Earth today.
3.8 billion years ago is the oldest indirect evidence for life on Earth. Indirect evidence is found in 3.8-billion-year-old banded iron deposits (chert) which contain a Carbon 13 to Carbon 14 ratios similar to ratios found in organisms today.
What else can I help you with?
How many years ago did life on earth begin?
4.567 million years ago
Things in the ocean that begin with a Y?
Yachts are in the ocean. Yachtsmen are on many of those yachts.
How many years is the Pacific Ocean?
I would like to know how many years old the Pacific Ocean...!
How many years ago did life first begin on earth?
Life is estimated to have first begun on Earth around 3.5 to 4 billion years ago. This early life was likely in the form of single-celled organisms in the Earth's oceans.
How many years after Luthers criticism did Galileo begin to study planets?
How many years after Luther’s criticism did Galileo begin to study planets?
How many years ago did history begin?
About 500 years ago.
Where did cauliflower begin at?
In Italy many years ago.
How many years after the Missouri Compromise did the Civil War begin?
41 years
How many years ago did the neolithic age begin?
about 120 years ago
How many weekday in a one year?
262 in leap years that begin on Monday, Tuesday, Wednesday or Thursday 261 in leap years that begin on Sunday or Friday and regular years that begin on any weekday 260 in any year that begins on a Saturday and regular years that begin on Sunday
How many years after the united nation was formed did the Korean war begin?
2 years after
How many years ago did daoism begin?
Over 2,000.
