Longer Genes, Longer Flight

摘要

Every year, some 50 billion birds take to the air for their seasonal migrations. They may go 500 kilometers in a day and a few even travel from pole to pole. But how do they know when, where, and how far to fly? Now ornithologists have pinned down one of the genes that influences migratory behavior. And strange as it may sound, the length of that gene influences the length of the flights.