physics

Wave-particle duality, uncertainty, superposition, entanglement — what quantum physics actually says, what it predicts, and what it doesn't.

Forward time travel already happens. This is what it would actually cost a person who chose to use it — a one-way ticket, physically real.

How LEDs turn electricity into light using semiconductors, why they're 10x more efficient than bulbs, and the Nobel-winning blue LED story.

How thunderclouds build billions of volts, why lightning is hotter than the Sun's surface, and the rare sprites flashing above storms.

What string theory really proposes, the extra dimensions, M-theory, the multiverse landscape, and why critics call it unfalsifiable in 2026.

How nuclear fission splits uranium to release 200 MeV per atom: the 1938 discovery, chain reactions, reactor physics, waste, accidents and 2026 debate.

Two perspectives, one terrifying destination. From spaghettification to the firewall paradox — the real physics of falling into a black hole.

What if gravity vanished for one second? The math shows orbits shift by millimeters to meters, and the ground may carry you along. A thought experiment.

If the Sun vanished right now, we'd have 8 minutes of sunlight left. Then darkness, plummeting temperatures, and Earth drifting into interstellar space.

How physics, chemistry, earth and climate science and materials science work, with the evidence behind each field and the best deep dive for every topic.

Eight minutes after the Sun vanishes, Earth goes dark. What happens to life, physics, and civilization in the days that follow?

Sound is invisible, yet it shapes how we experience the world. Understanding it means diving into wave physics, the Doppler effect, and the strange world of ultrasound.