RT @scienmag: 200-years-old yellowed varnish removed from oil painting in seconds - Credits: Philip Mould / BBC https://t.co/tpkVGVBTUQ

RT @scienmag: 200-years-old yellowed varnish removed from oil painting in seconds - Credits: Philip Mould / BBC https://t.co/tpkVGVBTUQ (http://twitter.com/muhamadiqbaldar/status/935610450904883200)