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 51¶¯Âþ
LifeIt took 2000 years to make seed for America's famous 'corn belt' Maize reached the southern US 4000 years ago, but wasn’t farmed in cooler areas until 2000 years later – because it took that long to develop cool-hardy strains 51¶¯Âþ