Dear Kitty. Some blog

This 2016 video is called TOP 10 FLIGHTLESS BIRDS.

From Harvard University in the USA:

Genetics behind the evolution of flightless birds

April 17, 2019

Summary: Based on the analysis of the genomes of more than a dozen flightless birds, including an extinct moa, researchers found that while different species show wide variety in the protein-coding portions of their genome, they appear to turn to the same regulatory pathways when evolving flight loss.

Since Darwin’s era, scientists have wondered how flightless birds like emus, ostriches, kiwi, cassowaries and others are related, and for decades the assumption was that they must all share a common ancestor who abandoned the skies for a more grounded life.

By the early 2000s, new research using genetic tools upended that story, and instead pointed to the idea that flighlessness evolved many times throughout history. Left unanswered, however, were questions about whether…

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