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.. 
Ni opin orundun 17K, oja suga ni Okere bẹ̀rẹ̀ sí ní re sílẹ̀ ṣùgbọ́n láti ìbẹ̀rẹ̀ àwọn ọdún 1690, àriri Wúrà Látọwọ́ àwọn Olùwákiri ní agbègbè na tó dára pípẹ́ ní Minas Gerais ní Mato Grosso àti Goiânia loni, gba ibi àmúsìn na là lá iparun.. 