TechnologyA simple driving trick could make a big dent in cars' carbon emissions An AI-powered model found that approaching intersections more slowly could lower yearly US carbon emissions by up to around 123 million tonnes News
HumansWhy did humans evolve big brains? A new idea bodes ill for our future Recent fossil finds suggest that big brains weren't an evolutionary asset to our ancestors but evolved by accident – and are likely to shrink again in the near future Features