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Astronomers are up in arms, protesting against a proposed constellation of tens of thousands of orbiting mirrors intended to reflect light onto ground-based solar power plants and SpaceX’s envisioned one million orbiting data centers.

The…

Imagine waking up, groggy and bearded, on a space ship light-years from Earth. That’s how Ryland Grace, played by Ryan Gosling, awakens in the new space drama Project Hail Mary. As the audience soon learns, Grace, a middle school science…

It’s easy to think of pupils as simple holes that widen in the dark and shrink in the light. But if you look across the animal kingdom, you’ll see a variety of pupil shapes: vertical slits in cats and snakes, horizontal rectangles in goats and…