Here are some brief introductions to some of the exciting stuff that I spend my time on. More will come along the way.
The level is sort of secondary/high-school/early university. There are no equations, unless you click the blue math-buttons.
If you have further questions, or if you'd like me to write an article about another topic, you can ask them in my Q&A column, or contact me otherwise.
At the moment, most articles are eithers stubs or rather old and not too well-written, but the ones indicated with a colored icon are quite up-to-date
(there are more of those in the Danish version).