Workers at an Amazon fulfillment centre in Bessemer, Alabama in the US are voting on setting up the retailer’s first ever union. Amazon is one of the world’s largest employers. Winning the election doesn’t automatically mean workers are unionised and get a labour contract. It means only they have the right to negotiate for one. Raymond Hogler looks at what’s at stake.

Scientists recently found a chameleon the size of a paperclip on the island of Madagascar – the smallest ever discovered. It’s not the first miniaturised reptile that’s been found on the island. In recent years, researchers there have discovered large numbers of these teeny tiny reptiles, most of which are chameleons and frogs. Amphibian and reptile specialist, Mark D. Scherz, provides insights into what causes these animals to miniaturise and what this tells us about evolution.