A UK-based fossil tour guide used to pointing out fossils to tourists was given quite a treat recently when he discovered a rare purple dinosaur ... there are varying footprints that have been ...

However, it wasn’t immediately obvious that the footprints were made by two different species. Hatala, who is an expert in foot anatomy, determined they reflected different patterns of gait ...

The footprints were left in the mud by two different species “within a matter of hours, or at most days,” said paleontologist Louise Leakey, co-author of the research published Thursday in the ...