Scientists have created the first "semi-synthetic" life form - a genetically modified E. coli bacterium. Researchers feel that this is the first step towards creating new life forms with unique industrial or medical properties.
This microbe has six "letters" in its DNA molecule instead of the usual four and is able to function and replicate in laboratory conditions. The four "letter" DNA code is thought to have existed ever since life first evolved more than 3.5 billion years ago.
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