Traits are often lost during evolution, either because they are no longer beneficial or because they are too costly to maintain. When this happens, it is generally believed that the genes underlying the trait will eventually degrade as well, making it difficult if not impossible for the trait to re-emerge. Yet there are numerous examples in nature of once-lost traits re-emerging in descendent lineages.
Humans have been chasing the mythical waters that can keep them young for many centuries but researchers believe we need only look at a group of molluscs to find the key to living longer
Bivalve mollusks may hold the secret to a longer life phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.
<p>A new study on mollusk bivalves (clams, oysters, mussels, and scallops) in <em>Genome Biology and Evolution</em> reveals genes that may be associated with longer lifespans across diverse animals.</p>