Yng nghanol dirwedd wastad yr Arctig, dau chwaer rhagorol oedd yn sefyll.

In the midst of the flat Arctic landscape, two remarkable siblings stood.

Roedd Rhian a Gareth, cyfeillion a brodyr, yn wynebu eu hymgais fwyaf eto.

Rhian and Gareth, friends and siblings, faced their greatest challenge yet.

Roedd yr hydref yn gwasgu ei ddwysser ar y tundra, ac roedd gwynt oer fel gwaywffon yn plethu rhwng coed bach a changhennau noeth yr eira.

Autumn was pressing its intensity on the tundra, and a cold wind like a spear wove between the small trees and the bare, snow-covered branches.

Roedd Rhian, yr hŷn o'r ddau, yn wyddonydd gyda frwdfrydedd am ymchwil hinsawdd.

Rhian, the elder of the two, was a scientist with a passion for climate research.

Roedd hi'n llawn benderfyniad i gasglu data a allai newid y ddealltwriaeth o newid hinsawdd.

She was full of determination to gather data that could change the understanding of climate change.

Gareth, ei frawd iau, oedd arlunydd yn chwilio am ysbrydoliaeth – a chyfle i gryfhau'r cyswllt emosiynol gyda Rhian ar ôl blynyddoedd o bellhau.

Gareth, her younger brother, was an artist seeking inspiration—and an opportunity to strengthen his emotional connection with Rhian after years of drifting apart.

Mae gwyntoedd cryfion a chyflyrau anodd yn creu heriau yn eu hymgais.

Strong winds and harsh conditions presented challenges in their quest.

Er i'r storm barhau, roedd Rhian yn mynnu aros gwaethaf yr amodau er mwyn casglu mwy o wybodaeth.

Despite the ongoing storm, Rhian insisted on staying through the worst of the conditions to collect more information.

"Rhaid i ni aros," meddai Rhian yn gryf.

"We must stay," Rhian said firmly.

"Mae angen i ni wybod beth sy'n digwydd yma.

"We need to know what's happening here."

"Gwyn ei fyd, arosodd Gareth gyda hi.

Gratefully, Gareth stayed with her.

Roedd Gadwo'r symudrodd dod â nhw'n agosach.

Keeping still drew them closer.

Ymroddodd Gareth i ddal y tirweddau dramatig yn ei arluniaeth.

Gareth committed himself to capturing the dramatic landscapes in his artwork.

"Nid dim ond dau-ddimensiwn yw’r byd yma," ei ddywedodd, "mae'n symud a bydd yn ysbrydoli manifold bapur.

"This world is more than just two-dimensional," he said, "it moves and will inspire a multitude of papers."

"Yna, fe darodd storm fawr.

Then, a great storm struck.

Gwyntoedd wyllt yn chwythu drwy eu cysgylu bach, gan eu dal o fewn llawnaddef.

Wild winds blew through their small shelter, holding them within its full embrace.

Am oriau roeddynt wedi’u clymu hefo'i gilydd, pob un yn deall y gorau o hoffi dros y llall oedd fwy na'r argyfwng.

For hours, they were tied together, each understanding the love for the other was greater than the crisis.

Newidiodd y tirwedd o'u cwmpas, ond daeth Rhian i weld gwerth presenoldeb Gareth yn y system wyddor.

The landscape around them changed, but Rhian came to see the value of Gareth's presence in her scientific endeavor.

Roedd y storm wedi'i gwyro, a Rhian yn wynebu'r wlad o flaen hi.

The storm subsided, and Rhian faced the land before her.

Fe wnaeth Gareth ddal cyfrifon trawsnewidiol ei chwaer, yn ogystal â'r dirwedd, yn ei luniau.

Gareth captured his sister’s transformative stories, as well as the landscape, in his drawings.

Roedd clwyfau y dirwedd yn egluro.

The wounds of the landscape were explicated.

Roeddent wedi dysgu bod unrhyw gyflawniad proffesiynol yn bwysicach pan oedd y teulu a'r cysylltiadau personol yn cael eu hatgyfnerthu gennynt.

They learned that any professional achievement was more significant when family and personal connections were strengthened by it.

Yn y pellter, dechreuodd yr awyr newid i ffurf wahanol.

In the distance, the sky began to change into a different form.

Daeth heinau gwych yr hydref yn yr Arctig.

The majestic hues of autumn in the Arctic emerged.

Roedd y ddau, Rhian a Gareth, wedi dysgu werth newydd yno – gwaith, teulu, a chysylltiadau.

The two, Rhian and Gareth, had discovered a new value there—work, family, and connections.

Roedd anhawster yr amgylchfyd heb ei arwain i golli syniad o'r lluniad teuluol unigryw.

The difficulty of the environment did not lead them to lose sight of their unique family bond.

Yr Arctig oedd eu llwyfan, ond deallusrwydd y brodyr oedd eu nerth.

The Arctic was their stage, but the intelligence of the siblings was their strength.

Daeth y stori i ben gyda gwerth a dysgu tymhorol.

The story concluded with seasonal value and learning.

Mae’r amgylchfyd mae’n newid, ond mae aelodau’r teulu i oroesi ei gyd-drafodion yn aros.

The environment may change, but the family members surviving its negotiations remain.