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, ...

The Alien franchise has always focused on just one titular alien — the Xenomorph. Yes, over the years, we got extrapolations of the Xenomorph, like the Queen, and the facehuggers. Yet they all still ...

Clearing water-guzzling and soil-damaging alien invasive plants costs South Africa several hundred million rands every year. Now, a promising pilot project to recoup some of this cost by producing ...