If you want a strong magnet, the obvious answer is to buy one. However, for a variety of reasons, you might want to combine several smaller magnets. There are a few ways to do this, but the Halbach ...

How many decisions do we make each day? Source: geralt/Pixabay How many choices have you made today? I have made rather many, and it isn’t even nine o’clock yet. When my alarm went off this morning, I ...