How the Sun Shines

The story

Quarky puts on the thickest sunglasses in the universe and dives into the middle of the Sun. Down there it is unbelievably hot and squished, and hydrogen cores keep smashing together to build helium. Each smash sets free a tiny burst of energy, and trillions of those bursts every second become the sunlight that warms our faces eight minutes later. Quarky even spots quantum tunneling helping the cores sneak together when they should be pushing apart.