Under these drastically changing conditions, the struggle to survive favored the larger birds with deep, strong beaks for opening the hard seeds. Smaller finches with less-powerful beaks perished.

How fast does the beak move? To answer these questions, I’m recording high-speed X-ray videos of the feeding birds. Interestingly, I discovered some fascinating differences in beak movement ...

The discovery of a 69-million-year-old bird fossil is reshaping our understanding of avian evolution.