HumansMaths can make sense of Trump’s ‘madman’ North Korea strategy Outlandish threats in the standoff between North Korea and Donald Trump are bluffs whose main aim is to bolster support at home, says game theorist Petros Sekeris Comment
TechnologyThe blushing Englishman who stole nuclear secrets from the USWilliam Penney planned the Nagasaki bomb as part of the Manhattan Project, and kept the UK in the nuclear race. But was he a master of bluffing or a master spy?Features