Astrobiology.com says recent findings show that life may have arisen on this planet on two separate occasions. A recently posted news story says:
“Conditions suitable to support complex life may have developed in Earth’s oceans — and then faded — more than a billion years before life truly took hold, a new University of Washington-led study has found.
“The findings, based on using the element selenium as a tool to measure oxygen in the distant past, may also benefit the search for signs of life beyond Earth.
“In a paper published Jan. 18 in the Proceedings of the National Academy of Sciences, lead author Michael Kipp, a UW doctoral student in Earth and Space Sciences, analyzed isotopic ratios of the element selenium in sedimentary rocks to measure the presence of oxygen in Earth’s atmosphere between 2 and 2.4 billion years ago.”
Read the entire article here: http://astrobiology.com/2017/01/did-life-start-more-than-once-on-earth.html
U.S. legislators that believe that this planet, in fact the entire universe, is only 6, 000 years old may consider this an alternative fact.