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well barely know one know exept for dead people who lived a billon years ago

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Q: What was in the atmosphere 1 billion years ago?
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Related questions

How many years ago did large amounts of oxygen gas first appear on Earth's atmosphere?

After plants developed chlorophyll and multiplied to the point where they could "pollute" the primal atmosphere, somewhere between 1 and 2 billion years ago.


How many years ago is 2.8 Gyr?

1 Gyr is 1 billion years, so 2.8 Gyr is 2.8 billion years ago.


How old would we be if we were born a billion years ago?

1 Billion years old


How many years ago were all the continents joined together?

it was about 1 billion years ago.


What were chimps 1 billion years ago?

There were no chimps 1 billion years ago. At that time all life was single celled organisms and rudimentary multicellular ones.


Are cavemen 1 billion years old?

No. No multicellular life existed 1 billion years ago. Human-like primates first appeared about 5.6 million years ago and Homo sapiens only appeared about 200,000 years ago.


If 12'o clock midnight equals 4.6 billion years ago and 1 hour equals 1 billion years how many years is 3 hours and 6 hours?

3 hours = 3 hours PAST 12 o'clock = (3 x 1 billion) - 4.6 billion = 3 billion - 4.6 billion = -1.6 billion years = 1.6 billion years ago6 hours = 6 hours PAST 12 o'clock = -1.6 billion years + (3 x 1 billion) = -1.6 billion + 3 billion = 1.4 billion years ago


Is a 1 billion year old man dead?

There could be no such thing-- there were no people 1 billion years ago.


Did it begin in 4.56 billion years ago and in January 1?

yes


How did they know the distance the moon was from earth 1 billion years ago?

One billion years ago there were no humans on earth, so 'they' didn't know the distance from the moon to the earth.


Whats the first animal?

Best guess is a proto-bacteria about 3 to 4 billion years ago. First vertebrate was a marine worm about 1 billion years ago.


What is the name of the first supercontinent formed 1 billion years ago?

Pangaea