remained a mystery. the team at northumbria now believe that it escapes when magnetic field lines break and rejoin. the south korean technology giant naver has installed a unique coffee service in its latest office building, but there shouldn't be a need to queue — 100 service robots are deployed to fulfil orders. as well as delivering coffee, they also take food and small packages around the building. casa buonarroti displays the art collections of the buonarroti family, including the works of its most famous member, michelangelo. it's also home to allegory of inclination, painted by the pioneering 17th century female artist artemisia gentileschi. and there's more to her than meets the eye. she wasn't always covered by a veil.