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Microfossils called Hematites have been discovered in northern province of Quebec, Canada. Laser imaging showed that the may be the oldest form of life ever found.

These creatures are tiny, with a diameter half of a human hair, and up to half a millimeter in length.

There is a debate between scientists on the matter. Some are saying that the rocks these microfossils were found in are 3.77 billion years old, but other say they could be as old as 4.28 billion years.

That would put them on Earth a few 100 million years after the sun and Earth formed, before oxygen was present in Earth's atmosphere.