HumansChemical weapons treaty put to test over Novichok spy attack The poisoning of former spy Sergei Skripal and his daughter has prompted the UK to demand a “clarification” from Russia under article 9 of the 1997 treaty. It has never been invoked before News
TechnologyElection polling accuracy has not improved since the 1940s Failure to predict Brexit and Trump has created a crisis for the polling industry, but actually errors in election polls have stayed the same over the past 75 years Analysis