Blackbirds live longer in cities than in forests. But their telomeres, the repetitive stretches of DNA at the ends of the chromosomes, show that these city birds have a much poorer health status than their rural cousins.
Parents of millennials still living at home aren't the only ones with children that refuse to leave. Many animal species have adult offspring that are slow to take flight, but when and how they leave has been poorly understood by scientists. Now, new research on a desert-dwelling African bird is yielding some answers.