A science mystery, solved! After going missing for 78 years, the Clarion nightsnake (Hypsiglena ochrorhyncha unaocularus), a nocturnal snake first discovered in the 19th century, then struck from the scientific record, has been rediscovered. National Museum of Natural History researcher Daniel Mulcahy and his team found the species on the Mexican island of Clarion, which is its exclusive habitat. The reptilian species "could have remained unknown to science if not for the team’s efforts to solve the case surrounding its disappearance." Details here, and in the May 16 issue of PLOS ONE.