Dywedodd Dr David Williams, cydymaith ymchwil yn Ysgol Beirianneg Prifysgol Caerdydd, ei fod yn “amheus” pan ofynnwyd iddo ddefnyddio dyfais sganio i geisio datrys y dirgelwch.
“Roedd hi’n her, dyw’r ddyfais sydd gennym ni ddim wedi’i dylunio ar gyfer y diben penodol hwn,” meddai.
“Sganio micro-CT yw hyn – rhywbeth y byddech chi’n ei gael yn yr ysbyty, ond ar gyfer eitemau llai.”
Dywedodd Dr Williams ei fod “bob amser yn barod am her” ac yn mwynhau ceisio “datrys pos”.
“Fe wnaethon ni sgan cyntaf i weld a allen ni weld unrhyw beth, ac roedden ni wedi synnu braidd o weld llythrennau,” meddai.
“Aeth yr ail sgan yn ofnadwy, ond gyda’r trydydd sgan, fe wnaethon ni roi cynnig ar ddull gwahanol, a llwyddo i ddeall y cod.
“Ro’n i wedi fy syfrdanu ein bod ni wedi llwyddo i’w ddatrys.”
BBC News
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