Physics

Physics asks the simplest possible questions about the world and ends up with the strangest possible answers. Why does a ball fall? Because spacetime tells it where to go. Why does the sun shine? Because four hydrogen nuclei can fuse into one helium nucleus and the missing mass becomes light. Our articles cover the full sweep — from the practical mechanics of bridges and bicycles to quantum entanglement, from Aristotle’s first physics to Einstein’s relativity, from the history of the field to the cutting edge of space exploration.

You’ll find friendly walkthroughs of foundational topics — Newton’s laws, energy conservation, electromagnetism — alongside deeper dives on harder subjects: quantum mechanics, relativity, the experimental physics that turned 20th-century theory into 21st-century technology. Every article aims for two things at once: enough rigor to satisfy a serious student, and enough plain language to keep a curious newcomer turning the page.

When you’re ready to test what you’ve learned, our activities are short, focused challenges that turn passive reading into actual understanding.