New Scientist = Life need not be based on DNA. So say researchers who have created two new versions of the iconic molecule, which retain its double helix shape but are thinner or chunkier than the original.
“This is changing the rules of the game that every schoolchild learns,” says Steven Benner of the Foundation for Applied Molecular Evolution in Alachua, Florida. It implies that extraterrestrial life might be based on alternative genetic molecules.
DNA carries our genes, which tell our bodies how to grow and are passed from parent to child. …
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