Could the world's mightiest computers be too complicated to use?
10 October 2018
China, Japan and the US are racing to build the first exascale computer – but devising programmes clever enough to run on them is a different story
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Premium
Rewilding: Can we really restore ravaged nature to a pristine state?
10 October 2018
Vast tracts of land are returning to wilderness as farming retreats worldwide. But rewilding isn't an easy win – and debates rage about how to manage it
Traces of mystery ancient humans found lurking in our genomes
10 October 2018
Prehistoric humans were sexual adventurers, mating with Neanderthals and Denisovans, but DNA studies reveal dalliances with populations we never knew existed
