With England celebrating the re-opening of pubs after lockdown, drinkers in ‘The Eagle’ pub, Cambridge might like to sample a pint of ‘DNA’ – a brew named in honour of James Watson and Francis Crick’s historic discovery of the structure of DNA. At the same time, they might like to work out why this plaque on the wall of the pub would have 19th century physiologist Johann Friedrich Miescher spinning in his grave….