Anyone aged 50 or above can experience a child-free visit to the science discovery centre this month, at the next Over-50s’ Science Café.   Tuesday 14 November will see a takeover at Techniquest for those of a more mature vintage than usual, as an adults-only Science Café gets underway from 1pm that day. The theme will be the marine environment and guests will be treated to a live science show in the Science Theatre, produced with support from the Scottish…