New research into mutations in sperm helps us better understand why they occur, while debunking a few myths in the process, write ROX MIDDLETON, LIAM SHAW and MIRIAM GAUNTLETT
Perilous times for Venezuela
Trump’s brazen recognition of Juan Guaido as the interim president of Venezuela is an attempt to reverse the democratic will of the Venezuelan people, writes FIONA EDWARDS

THE Venezuelan people are facing a grave and dangerous situation, as the US dramatically escalates its campaign to oust Venezuela’s democratically elected government.
Donald Trump’s decision on Wednesday January 23 to recognise the unelected right-wing opposition leader Juan Guaido as Venezuela’s “interim president” is confirmation that a co-ordinated operation led by the US to bring about regime change, which is illegal under international law, is under way.
Following this outrageous announcement, Trump was asked whether he would consider military action against Venezuela and he replied: “All options are on the table.”
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