Dear Kitty. Some blog

A reconstruction of Mirarce eatoni perched on the horns of the ceratopsian dinosaur Utahceratops gettyi. Image credit: Brian Engh, dontmesswithdinosaurs.comFrom the University of California – Berkeley in the USA:

Rare fossil bird deepens mystery of avian extinctions

Most complete North American enantiornithine fossil was aerodynamic equal of modern birds

November 13, 2018

Summary: Today’s birds descend from a small number of bird species living before the dinosaur extinction. Some of the birds that went extinct, the enantiornithines, were actually more common than and out-competed modern bird ancestors. Analysis of a newly described fossil, the most complete known from the Americas, demonstrates, too, that the enantiornithines were as agile and strong in flight as the ancestors of modern birds. Why, then, did enantiornithines die out and modern birds flourish?

During the late Cretaceous period, more than 65 million years ago, birds belonging to hundreds of different species flitted around the dinosaurs and through the forests as abundantly as they flit about our woods and fields today.

But after

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