The UK Civil Aviation Authority (CAA) publishes regular statistics on the punctuality of flights arriving at and departing UK airports. These data can be retrieved with the script available on the GitHub repository accompanying this blog article: `get_data.py`.

An algorithm to find the equation of the circle containing three (non-colinear) points.

A recent tweet by @iwontoffendyou posed the following problem: with reference to the figure below, what is the radius of the orange circle, which is tangent to the $y$-axis, the unit circle and the curve $y = \sqrt{x}$?