HumansMorality is rooted in the way societies get their energy Why do different groups of people have vastly different views of right and wrong? Archaeologist Ian Morris thinks he's found what's really fuelling our values Opinion
EarthCO2 emissions may have stalled in 2014 – why? The surprise plateauing of carbon emissions even as the global economy grew may be a one-off event fuelled by several factors 51¶¯Âþ