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How Birds Got Their Beaks

When birds got their wings, they lost the clawed fingers wielded by their dinosaur relatives. But they evolved a new “finger”—in their face. And what a boon that has been….

How an RNA Gene Silences a Whole Chromosome

Researchers at Caltech have discovered how an abundant class of RNA genes, called long non-coding RNAs (lncRNAs, pronounced link RNAs) can regulate key genes. By studying an important lncRNA, called…