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Sùil air mean-fhàs eòin – mar a tha iad air nochdadh ann an iomadach raon agus air atharrachadh gus a bhith beò anns a h-uile àrainneachd air a’ Chruinne-cè. Ach ciamar a ’s urrainn dhuinn am mean-fhàs buadhmhòr seo a mhìneachadh?

Tha eachdraidh nan eun a’ dol air ais 220 millean bliadhna chun a’ chiad dìneasaran, a bha a’ riaghladh airson 150 millean bliadhna agus ’s e na h-eòin an aon sliochd ceangailte riutha – dearbhadh gu bheil dìneasaran fhathast beò nar measg. Chaidh aon de na fosailean as sine de eun ùr a lorg bho chionn ghoirid agus tha sin a’ tabhainn fiosrachadh ùr mu ciamar agus carson gur e iadsan a mhair beò an dèidh astaroid cuir às dhen a’ mhòr chuid de dh’ ainmhidhean a’ chruinne-cè – agus e a’ foillseachadh na tha air cùl soirbheachas a’ mhean-fhàis iongantach aca.

Tha an sreath seo de dhà phrògram a’ leantainn eòlaichean bho air feadh an t-saoghail – ann an Sìona, an Roinn Eòrpa, Aimeireaga agus nas fhaide air falbh – gu làraichean àrc-eòlais agus obair-lannan, is iad a’ sireadh freagairtean.

A fascinating look at the evolution of birds - how they have conquered multiple territories and adapted to every environment on Earth. How can we explain this evolutionary triumph?

The history of birds can be traced back 220 million years to the first dinosaurs, which reigned for 150 million years and of which birds are the only descendants - proof that dinosaurs still live among us. A recent discovery of the oldest fossil of a modern bird offers new clues about how and why they were the only ones to survive the deadly asteroid impact that wiped out most of Earth’s creatures - and reveals the secret of their evolutionary success.

This documentary follows experts from around the world - in China, Europe, America and beyond - to excavation sites and laboratories as they search for answers.

Dubbed in Gaelic with English subtitles