Stag beetles have their sumo matches. Female fireflies who murder their mates. These are some of our favorite mating behaviors among insects and arachnids.

Today in Around the World in 50 Experiments, we're heading to Norway! Learn about Vikings, Fjords, Northern Lights and ...

From bubblegum-coloured lakes in Australia to a solar-powered safari camp in Botswana, these are BBC journalists' top ...