In the evolutionary history of birds, there is a 70-million-year gap filled with questions. During this time, all the modern bird groups we know today emerged, but science has yet to fully explain how the transition from the ancient, more dinosaur-like birds to modern birds occurred. Now, an analysis of a fossil with an unprecedented degree of preservation — belonging to a previously unknown bird species that lived in what is now Brazil 80 million years ago — could help illuminate how this process occurred. The discovery is being hailed as a “Rosetta Stone” for the study of bird evolution, as it may unlock many of the mysteries surrounding their evolution. The research findings were published in Nature last Wednesday.
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