Lluniau: Trychineb Aberfan // In pictures: The tragedy of Aberfan
Ar 21 Hydref 1966 cafodd 144 o bobl eu lladd pan lithrodd tomen lo i lawr mynydd a chladdu ysgol gynradd a deunaw o dai ym mhentref Aberfan. O"r rheiny fu farw, roedd 116 yn blant rhwng saith a deg oed.
On 21 October 1966 a coal tip slid down a mountain and engulfed a primary school and 18 houses in the village of Aberfan - killing 116 children between the ages of seven and ten, and 28 adults. Half a century on, we look at some of the most powerful images of the tragedy"s aftermath.