Life-form thriving on arsenic was discovered on Earth

Life-form thriving on arsenic was discovered on Earth

Weak Signal's progress: advanced

This Weak Signal came from: 
Research and technology organisations

The source of this Weak Signal: 
NASA, Dec 2, 2010: http://www.nasa.gov/topics/universe/features/astrobiology_toxic_chemical.html

When did the Weak Signal manifest ? 
2005-now

Weak Signal's description 
NASA-funded research discovered microorganisms on Earth (in Mono Lake, California), able to thrive and reproduce using the toxic chemical arsenic. According to NASA, this finding of an alternative biochemistry makeup will alter biology textbooks and expand the scope of the search for life beyond Earth. It has changed the fundamental knowledge about what comprises all known life on Earth, and increases the likelihood of extra-terrestrial life.