LifeDid monkeys really sail the oceans on floating rafts of vegetation? The mystery of how some species colonised new continents is as old as the theory of evolution itself. Now, with fresh clues surfacing, the rafting hypothesis might finally sink or swim Features
EnvironmentThe Amazon is turning into savannah – we have 5 years to save it We have been hearing warnings about the destruction of the Amazon rainforest for decades, but experts say a catastrophic tipping point is now just over the horizon. Are they right? And if so, what can we do to pull things back? Features