Universe

Although their ranks have diminished, the Flat Earth Society is alive, the planet is wrapped in an ice wall, and the sun and the moon are the exact same size.

• By Katie Heaney

Although our curiosity concerning the origins of the universe might not be practical, it's uniquely human.

• By Michael White

We know what life looks like on Earth, but will we know it when we see it somewhere else?

• By Michael White