This is the experimental set-up used to test whether dogs can discriminate emotional expressions of human faces. Credit: Anjuli Barber, Messerli Research Institute Dogs can tell the difference between happy and angry human faces, according to a new study in the Cell Press journal Current Biology on February 12. The discovery represents the first solid

This is the experimental apparatus to test whether dogs can discriminate emotional expressions of human faces. Credit: Clever Dog Lab, Messerli Research Institute A team of cognitive scientists at the University of Veterinary Medicine Vienna has demonstrated for the first time that dogs can differentiate between happy and angry human faces. Dogs may have developed

Princeton researchers have examined how individual cells act collectively to form structures called biofilms that often play a critical role in disease and other processes. Shown above is a simulation of the bacteria Vibrio cholerae forming a biofilm, with each slightly curved, rod-shaped unit indicating individual bacteria. The architecture shows vertically oriented bacteria at the

These are water droplets on a lotus leaf. Credit: C. Falcón Garcia / Technical University of Munich Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is often very difficult, in part because they are extremely water-repellent. A team of scientists from

Rat (stock image). Credit: © Bokeh Art Photo / Fotolia Engineered tissue containing human stem cells has allowed paraplegic rats to walk independently and regain sensory perception. The implanted rats also show some degree of healing in their spinal cords. The research, published in Frontiers in Neuroscience, demonstrates the great potential of stem cells —

Nanostructures of the wing of Pachliopta aristolochiae can be transferred to solar cells and enhance their absorption rates by up to 200 percent. Credit: Radwanul H. Siddique, KIT/Caltech   Sunlight reflected by solar cells is lost as unused energy. The wings of the butterfly Pachliopta aristolochiae are drilled by nanostructures (nanoholes) that help absorbing light

Crohn’s disease is an inflammatory bowel disease that affects nearly one million children and adults in the United States. Credit: © 7activestudio / Fotolia Penn Medicine researchers have singled out a bacterial enzyme behind an imbalance in the gut microbiome linked to Crohn’s disease. The new study, published online this week in Science Translational Medicine,

This is Dr Nicola Wilck at the lab bench. Credit: Müller lab, MDC Common salt reduces the number of certain lactic acid bacteria in the gut of mice and humans according to a study published in Nature by Berlin’s Max Delbrück Center and Charité. This has an impact on immune cells which are partly responsible

This is a bull trout, a popular fish species of conservation concern, that find shelter in mountain stream climate refugia.Credit: Bart Gamett, U.S. Forest Service A new study offers hope for cold-water species in the face of climate change. The study, published today in the Proceedings of the National Academy of Sciences, addresses a longstanding

The experimental mouse on the right lacks a gene for ankyrin-B, causing his fat cells to slurp up twice as much glucose and making him fatter than his normal companion at left. Credit: UNC Nutrition and Obesity Research Center Obesity is often attributed to a simple equation: People are eating too much and exercising too

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