The Top 7 Questions Everyone Has After Reading 'A Brief History of Time'

1. What is a black hole, really? Black holes are regions where gravity is so strong that nothing—not even light—can escape. They’re not cosmic vacuum cleaners, but rather the collapsed cores of massive stars.
2. How do we know the universe is expanding? The redshift of distant galaxies shows they’re moving away, like raisins in rising bread. This evidence supports the big bang theory.
3. Could time travel ever be real? In theory, yes—if we could harness wormholes or travel near light speed. In practice, it’s far beyond our current technology.
4. What is Hawking radiation? It’s faint energy emitted by black holes due to quantum effects, meaning black holes can slowly evaporate over time.
5. Why does time only move forward? Entropy—the tendency toward disorder—gives time its arrow. It’s why we remember the past, not the future.
6. What’s so weird about quantum mechanics? Particles can exist in many states at once, and only settle when observed. Reality at the smallest scales is a dance of probabilities.
7. Will we ever find a theory of everything? Scientists are working on it, with ideas like string theory, but it’s still a work in progress.

If you have more questions, you’re in good company—so did Stephen Hawking. That’s what makes science an endless adventure!