In the past, birds lived with tail ends similar to ribbons and arrows in the supercontinent of Gondwana, precisely to the north of the Hemisphere.
Gondwana's supercontinent used to include Africa, Antarctica, Australia, India and South America.
The discovery was revealed by researchers in 2011, when they found the fossil birds aged 115 million years to the north of the Hemisphere. But now, new discoveries show that the ancient birds also live south of the Hemisphere, thus opening up a new theory of bird evolution.
How the ancient bird looks like?
Twin-tailed
Ancient bird illustration with ... An ancient bird illustration with an arrow tails. (Deverson Pepi, via sciencespacerobots)
In a fossil found in Araripe Basin, Brazil, it appears that the twin-tailed birds were only 14 centimeters in size. The bird was later identified as coming from the Cretaceous era.
Birds are often relaxed on a tree limb
The picture of the ancient birds ... The picture of an ancient bird that sits relaxed on a tree branch. (Gabriel Lio)
Researchers believe that the bird that lived about 115 million years ago was included in the Enantiornithes group, a group of birds that co-existed with dinosaurs of its time. This bird fossil was found in northeastern Brazil.
The fossil findings are horrendous
Ancient bird fossils that ... Ancient bird fossils found by researchers. (Ismar de Souza Carvalho)
In 2011, researchers found the first fossil of birds suspected as the oldest bird ever found. Even from the fossil, the tail of his twin arrows is clearly laid out.
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