66 million years ago, a meteorite struck planet Earth, in the current Yucatan Peninsula, in Mexico. This fact caused the extinction of 75% of species, including dinosaurs. But among which survived, there were the birds. Scientists have a theory about why.
The Smithsonian Magazine has published an article defending the theory that the birds survived thanks to its beak.
It so happens that the first birds (and in general, the current ones) descended from the dinosaurs, only that during the Cretaceous period these species lost teeth and they developed spikes.
The beaks of the birds were the tool with which these animals could feed on seeds and fruits, This allowed them to survive the time after the meteorite impact, in which ash covered the skies and caused the disappearance of vegetation and which in turn was the end of herbivorous dinosaurs and their predators, carnivores.