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The fossil of a previously unknown species of 'sea scorpion', measuring over 1.5 meters long, has been discovered in Iowa, USA, and described in the open access journal BMC Evolutionary Biology. 

Dating back 460 million years, it is the oldest known species of eurypterid (sea scorpion) - extinct monster-like predators that swam the seas in ancient times and are related to modern arachnids.

An international group of researchers have found that food craving activates different brain networks between obese and normal weight patients. This indicates that the tendency to want food may be 'hard-wired' into the brain of overweight patients, becoming a functional brain biomarker. 

Obesity is one of the most difficult problems facing modern society. Treating obesity is a health priority, but most efforts (aside from bariatric surgery) have met with little success. In part, this is because the mechanisms associated with the desire to eat are poorly understood. Recently, studies are beginning to suggest that the brain mechanisms underlying obesity may be similar to those in substance addiction, and that treatment methodologies may be approached in the same way as other substance addictions, such as alcohol or drug addiction. 

Exercising together brings us closer to one another, while exercising with those close to us improves our performance. Those are the conclusions of an Oxford University study published this Friday in the journal PLoS ONE.

Los individuos previamente diagnosticados con enfermedades del corazón pueden ser menos propensos a experimentar insuficiencia cardiaca, ataques al corazón o accidentes cerebrovasculares, o de morir de estos eventos, si tienen mayores niveles en sangre de dos proteínas muy estrechamente relacionadas, de acuerdo con un nuevo estudio dirigido por un equipo de investigación de la Universidad de California, San Francisco (UCSF).

Well known among nature’s best tricksters for their ability to change color to fit their background, chameleons have yet another talent up their lizardly sleeves – eyes that swivel around and appear to be looking in two directions at once.