A ydym yn gwybod mai dweud celwydd mae rhywun? Y cyn-blismon Alun Hughes sydd â'r atebion. Can we tell when someone is lying? Retired police inspector Alun Hughes has the answers. Show more
Discover 11,128,835 listings and 280,413 playable programmes from the BBC
A ydym yn gwybod mai dweud celwydd mae rhywun? Y cyn-blismon Alun Hughes sydd â'r atebion. Can we tell when someone is lying? Retired police inspector Alun Hughes has the answers. Show more