A string of numbers. They can mean something, or nothing. They can guide us to patterns in nature, or drive a mathematician to the brink of his or her sanity.

Eleanor Wood's "Fibonacci" is a story that even non-mathematicians can appreciate. It tells of the sting of failure, and the exhilarating atmosphere of success.

Have you ever wondered whether the things you know are indeed true? We, especially when at a young age, tend to take things at face value. We had, at one time or another, believed in ghosts and magic. Even the smartest people in the past had believed that the world was flat, or at the centre of the universe, or was magically created.
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But that’s in the past no? We’re way too smart to be fooled again. Or are we?

Ah, water. It's been around all our lives and all our planet's life. So we ought to know everything there is to know about it, right? Not really. Water is probably the most unique chemical in the universe, it's properties are still a mystery to us even after centuries of research. But that shouldn't stop you from gulping it down. Unless you're talking about homeopathic 'medicine'. Throw that in the garbage can right now.

So what's new with H2O? Quite a lot. 

The electron. The first subatomic particle to be discovered, and much of it is thanks due to the developments in electrical engineering during the Industrial Revolution. But proving something that can't be seen is hard, an extraordinary amount of evidence was required.

​And how extraordinary it was!

With Part 1 we covered the origins of physics, the questions that gave birth to it as well as the though process of early physicists. With Part 2, physics came of age with the application of the scientific method and mathematics.
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In this third part of the series, we discuss how physics itself is applied to the real world and its problems.