Knowledge and meaning

In this excerpt from “One Hand Clapping,” Nikolay Kukushkin makes the case that neurons reveal how memory, meaning, and even consciousness emerge from the same biological roots in humans, sea slugs, and beyond.

In “Warhead,” neuroscientist and national security adviser Nicholas Wright explains how the brain navigates warfare and why it is our ultimate weapon (and instrument for peace).

If all massive objects emit Hawking radiation, not just black holes alone, then everything is unstable, even the Universe. Can that be true?

The laws of physics obey certain symmetries and defy others. It’s theoretically tempting to add new ones, but reality doesn’t agree.

For centuries, vaccines have been the top life-saving, expert medical intervention known to humans. How can individuals make the right call?