What is living in your gut? It might depend less on your diet, exercise habits, weight and sex than you think, according to new findings. Our health is tied to trillions of organisms that live in and on us.
Researchers propose a new evolutionary reason for why many underfed lab animals live longer
Trees have rings, horses have teeth and even rocks have radiocarbon decay. But how can you tell an octopus’s age? This isn’t a frivolous question.