ELI5: How does fusion energy work

Fusion energy works by smashing tiny things together really, really hard to make a new thing and release a lot of energy.

Imagine you have two bouncy balls, let's call them hydrogen balls, and you want to make one bigger ball, a helium ball. Normally, if you just gently push them together, they'll bounce apart. They don't want to stick!

To make them stick and form the bigger ball, you need to:

• Heat them up SUPER hot – like hotter than the sun! This makes them move incredibly fast. Think of it like heating up water to make steam; it gets crazy energetic.
• Squeeze them together REALLY hard. Imagine trying to squish two magnets together when they're facing the same way - they push back! You need a lot of force to overcome that.

• The new helium ball is a tiny bit lighter than the two hydrogen balls were combined.
• That tiny bit of missing weight turns into a HUGE amount of energy, like a tiny explosion! This energy is what we can use to make electricity.

So, fusion is like smashing tiny balls together at super speeds and temperatures to make new balls and lots of extra energy. The sun does this all the time with hydrogen to make helium, giving us heat and light! We're trying to do the same thing here on Earth to make clean energy.