Oldest skeletons add to understanding of evolution in time for International Bat Appreciation Day

The 52-million-year-old bat fossils were found in Wyoming, USA.

bat fossil skeleton
A photo of one of the two newly described bat skeletons representing Icaronycteris gunnelli. This specimen, the holotype, is now in the American Museum of Natural History’s research collections. Credit: Mick Ellison/©AMNH.