First arsenic-based bacteria

According to Official Guinness Records,

Life on Earth uses six basic ‘building block’ elements to make up its molecular structure: carbon, nitrogen, hydrogen, oxygen, sulphur and phosphorus. In December 2010 NASA scientists announced their discovery of bacteria in the briny Mono Lake, California, USA, which shows the unique capability of incorporating the element arsenic into its DNA and proteins as a substitute for phosphorus.

For a complete list of 2010 records, please visit 2010 Guinness Records in United States.

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