Mae'r Prif Weinidog, Carwyn Jones wedi penodi seicolegydd a niwrowyddonydd o fri rhyngwladol, yr Athro Peter Halligan, i swydd Prif Gynghorydd Gwyddonol Cymru.
First Minister Carwyn Jones has appointed internationally renowned psychologist and neuroscientist, Professor Peter Halligan, to the post of Chief Scientific Adviser for Wales.