What's stopping us from building useful quantum computers? And how long until we'll have them?

Here's a brief introduction to the possible future of computing.

Using maths to simulate the behaviour of criminals.

How the maths that is used to predict earthquakes can help fight gang crime.

Should we let go of the "one person, one vote" principle?

How stupid systems can use clever ways of finding things.

How crinkly is crinkly?

If I tell you that it's Monday today, then you know it's not any of the other six days of the week. Perhaps the information content of my statement should be measured in terms of the number of all the other possibilities it excludes? Back in the 1920s this consideration led to a very simple formula to measure information.

Kolmogorov complexity gives a high value to strings of symbols that are essentially random. But isn't randomness essentially meaningless? Should a measure of information assign a low value to it? The concept of sophistication addresses this question.