Commandant David Berger had the power to implement his ideas, and he did so. Now, we return to a sane fighting strategy.

Beneath the chaos of jungle cries and ocean songs lies a hidden logic. From tuskfish that grunt underwater to koalas that bellow like giants, these bizarre sounds evolved to attract mates, warn rivals ...

If you thought laughter was just a human trait, you couldn’t be more wrong. Many animals have their own unique ways of expressing joy.