Scientists believe they could be a step closer to solving the mystery of how the first birds took to the air.
A study published in the journal Nature suggests that the key to understanding the evolution of bird flight is the angle at which a bird flaps its wings.
A study published in the journal Nature suggests that the key to understanding the evolution of bird flight is the angle at which a bird flaps its wings.
| Lees meer: | BBC News National Geographic |
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