Once common along the Pacific coast of North America, the Western Pond turtle has all but disappeared from Canada and is threatened in the United States and Mexico by river dams, invasive plants, draining of wetland and its natural predators. Leer más.

Nel libro una meravigliosa presentazione delle popolazioni locali della Testudo hermanni hermanni ancora presenti in Italia, Francia e Spagna. Vi consigliamo questo libro di oltre 200 pagine per la descrizione dettagliata delle caratteristiche peculiari di ogni popolazione, la minuzia di particolari nell’illustrazione degli habitat, le numerosissime immagini che ne fanno l’unico volume che presenta in modo dettagliato e completo questa specie evidenziandone la preziosa presenza sul nostro territorio nazionale. Leer más.

In the evolutionary long run, small critters tend to evolve into bigger beasts — at least according to the idea attributed to paleontologist Edward Cope, now known as Cope’s Rule. Using the latest advanced statistical modeling methods, a new test of this rule as it applies dinosaurs shows that Cope was right — sometimes. Leer más.

In the year 2010, a group of students from the International School of Film and Television from San Antonio de los Baños, Cuba, made a film: “Anolis: Vigilantes of the Day,” an excellent documentary of nine minutes about Cuban anoles. The documentary is narrated in Spanish and has the best aspects of the natural history of these lizards, including some ecomorphs and the use of the dewlap in displays. Leer más.

Sin duda, los dinosaurios son los animales terrestres más grandes que han existido sobre la faz de la Tierra, pero, ¿cuál fue el dinosaurio más grande? Esta es una pregunta que casi todos nos hicimos en nuestra infancia, y que no es en absoluto una cuestión fácil de responder. En primer lugar, grande, en una palabra muy poco precisa. Habría que distinguir pues entre el dinosaurio más largo, el más alto, y el más pesado, aunque esto podría coincidir. Leer más.