Some primitive birds boasted four wings, before evolution led them to ditch their hind feathers in favour of webbed or scaly feet, Chinese scientists said.
The post Early birds had four wings, not two appeared first on COSMOS magazine.
Source: http://www.cosmosmagazine.com/news/early-birds-had-four-wings-not-two/
Genelle Frenoy Georgianna Robertson Georgina Grenville Gina Carano Gina Gershon Gina Philips Gisele Bündchen Giuliana DePandi
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