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Detaljer om upptäckten i Nature: www.nature.com/articles/nature22055.epdf?referrer_access_token=OEkWycD2ZQThtFRUy6OMetRgN0jAjWel9jnR3ZoTv0P7x7v4qNxuMLvQ8-DFl995mr7kUWpvoAq68N4zEPe5-kEN2DHIX2El616ksqy8ZxTyZVLBrxc9BFrtoTY2k--YQaZezoSL-uiLcG7yl4dM3PwjtP3Yh6k4-aG43NRY-PPwHWQ3yYAsNT6q-A8VmLpOIAGjPzlwDDMauHT-9exQYEkckZ_e9tPOVNGy6AhdM72qBFXRah8kmju99fC69BbWwzo43SbiaYWIC7KRZo3m7R5ldGZGlX2rUauS12al1-cTVlbtPJyj9ayp5aOwoHHS&tracking_referrer=www.theguardian.com