Brazil’s resettlement of farmers has driven Amazon deforestation Calais migrant chaos is a taste of what a warmer world may bring Nemo seems to thrive in waters warmed by climate change Ancient crystals show Earth’s magnetic field switched on early Leading climate scientist: future is bleaker than we thought Earth now halfway to UN global warming limit Humans accidentally created hidden carbon sink in the desert Hillary Clinton wants every home to be powered by clean energy Only 100 tigers left in Bangladesh after last count got it wrong Iron-age arsonists’ leftovers hint at how Earth’s poles may flip Leading climate scientist: Future is bleaker than we thought Bahamian paradise viewed from space captures ocean in motion Megafauna extinction: DNA evidence pins blame on climate change Myth of pristine Amazon rainforest busted as old cities reappear Genetic engineering creates rice strain that makes less methane Pyrite power: Can we reinvent ‘fool’s gold’? Killers, kicks and cures: Our complex relationship with plants UK is perfectly placed to use 100 per cent renewable power Garden of Eden dries as ISIS, Turkey and Iraq fight over water Fish flick genetic switch to dodge climate change disaster