Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

When your steam engine build requires multiple microscopes, including those of the scanning electron variety, you know you’re building something really, really tiny. All of the usual tiny superlatives ...

When an inventor has a unit of measurement named after him, it's clear his work had more than a small impact on scientific and industrial progress. So it was for James Watt, whose Watt engine is often ...