Life originated on earth about how many years ago?

The Earth formed about 4.5 billion years ago. 700 million years later (3.8 to 3.5 billion years age) life started. the earliest known life form were single celled organisms which roamed the earth they appeared around two billion years ago. The Earth formed about 4.5 billion years ago.

on this day in 1833, president andrew jackson announces that the government will no longer use the second bank of the united states, the country's national bank. a national bank had first been created by george washington and alexander hamilton in 1791 to serve as a central repository for federal fund

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