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We describe a new species of red-eyed frog of the genus Pristimantis from the tropical forest at elevations of 1000–1350 m on western slope of the Cordillera Occidental, department of Risaralda, Colombia. The new species differs from congeners by having dorsum skin shagreened with low tubercles; vocal sac single, median and subgular in males, iris red wine in females copper red in males, and by presenting black groin coloration with yellow light blotches.  Leer más.

https://blogger.googleusercontent.com/img/a/AVvXsEhof6Vi7hvakCWEehLy3SBiGcERgQeCSB0-MjcyHe7dzrjPndpZoqD9gQZ-btJZmkoAYLQbmX1ntolAMn-aEBUtTc9oLmsEXV5Q4JXNPUJ4VtH1OnHxThNgGDjcBtEOeiiSHgAfDEBVfaypA1A-T0Ir0GPs6Nwx5IwDdM-rmAGGr52NQqDfSkl1FeIAYw=w400-h265

multidisciplinary team explains, thanks to a very simple mathematical equation, the complexity of the system that generates these patterns. This discovery contributes to a better understanding of the evolution of skin color patterns: the process allows for many different locations of green and black scales but always leads to an optimal pattern for the animal survival. Leer más.

https://journals.aps.org/prl/article/10.1103/PhysRevLett.128.048102/figures/2/medium

Levin es el padre de los primeros robots ‘vivientes’, conocidos como xenobots, por utilizar células de rana Xenopus laevis. Ahora ha seguido trabajando con esta especie, a la que ha conseguido regenerar una pata amputada. Ahora, de la mano de su colegaNirosha Murugan, lo han conseguido mediante un cóctel de fármacos sobre un molde de silicona sellado a su muñón. A la rana le volvió a crecer una pata funcional pasados 18 meses. Leer más.