EarthOur lust for tastier chocolate has transformed the cocoa tree Ever since we domesticated the cocoa tree over 3000 years ago, we have been breeding them to make tastier chocolate – but in the process we have made them vulnerable News
LifeAncient microbes caused Earth’s first ever global warming Over 3 billion years ago, the sun was faint so our planet should have been a snowball. But it wasn’t – and microorganisms may have been what kept it warm News