We have vexed and bothered every plant and every animal on every continent.

Shaped a little like a loaf of French country bread, our brain is a crowded chemistry lab, bustling with nonstop neural conversations.

There is that unique moment when one confronts something new and astonishment begins.

We tend to think of heroes only in terms of violent combat, whether it's against enemies or a natural disaster. But human beings also perform radical acts of compassion; we just don't talk about them, or we don't talk about them as much.

If we mammals don't get something to eat every day or two, our temperature drops, all our signs fall off, and we begin to starve. Living at biological red alert, it's not surprising how obsessed we are with food; I'm just amazed we don't pace and fret about it all the time.

Artificial intelligence is growing up fast, as are robots whose facial expressions can elicit empathy and make your mirror neurons quiver.

Couples are jigsaw puzzles that hang together by touching in just enough points.