One of the proposals was the existence of lifeforms that use arsenic instead of phosphorus in DNA.A December 2010 NASA press conference stated that the bacterium GFAJ-1, which has evolved in an arsenic-rich environment, is the first terrestrial lifeform found which may have this ability.. 
Lẹ́yìn ọ̀pọ̀lọpọ̀ ẹ̀kọ́ tí mo ti rí kọ́ nídẹnukọlẹ̀ orun, oorun rà mí lọ lọ́wọ́ kan ní ṣáá.. 