One of sport’s greatest cheating scandals has erupted again. It may have far-reaching ramifications for Cricket Australia and several players.

Globally significant collections of fossils, plants and rocks are held at separate institutions. Combined, they could support a dedicated natural history museum.

On the meaning of fairness for pensioners, and whether there is a kinder way to manage invasive species. Here’s an edited selection of your views.

Like Guns, Germs and Steel, this book is ambitious, provocative and imperfect. It’s also difficult to put down.