There's room for all types in a newly described fossil that shows 259 baby fish swimming together in a school, approximately 50 million years ago. According to the authors of a new study published Wednesday (May 29) in the journal Proceedings of the Royal Society B, this ex-school may be the earliest known fossil evidence that prehistoric fish swam in unison, just as modern fish do today. A team of Arizona researchers stumbled upon this remarkable rock during a visit to the Oishi Fossils Gallery of Mizuta Memorial Museum in Japan. Working with the museum, the researchers determined that the...