Beasts

Orcas (or killer whales) are one of the planet''s supreme predators. Alongside humans, they have the most complex brains to be found in nature. But while one of these two species has killed 200 million members of its own kind in the twentieth century alone, the other has killed none. This is where Jeffrey Masson''s fascinating new book begins: there is something different about humans.

Masson has...