n artist's impression of the 147 million-year-old Archaeopteryx.

An artist's impression of the 147 million-year-old Archaeopteryx. It's the most ancient bird known, but it was unknown if the feathered creature could actually fly. A new analysis suggests its brain was equipped for flight, which means birds may have been flying millions of years earlier than previously thought. Archaeopteryx is part of a debate over the link between birds and dinosaurs. It has many dinosaur-like features, such as teeth and clawed hands, but it also has feathers. Credit: John Sibbick/NMH

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