Combining a biological heart and a silicone robotic pump, researchers created a biorobotic heart that beats like a real one, with a focus on a valve on the left side of the heart. The heart valve simulator can mimic the structure, function, and motion of a healthy or diseased heart, allowing surgeons and researchers to demonstrate various interventions while collecting real-time data.
Read more …A beating biorobotic heart aims to better simulate valves
Researchers have created the world's largest ancient human gene bank by analyzing the bones and teeth of almost 5,000 humans who lived across western Europe and Asia up to 34,000 years ago. By sequencing ancient human DNA and comparing it to modern-day samples, the international team of experts mapped the historical spread of genes -- and diseases -- over time as populations migrated. They found: The startling origins of neurodegenerative diseases including multiple sclerosis; why northern Europeans today are taller than people from southern Europe; and how major migration around 5,000 years ago introduced risk genes into the population in north-western Europe -- leaving a legacy of higher rates of MS today.
Read more …Ancient DNA reveals reason for high multiple sclerosis and Alzheimer's rates in Europe
Starting a new year, many people pledge to enact self-care routines that improve their appearance. And facial sheet masks soaked in skin care ingredients provide an easy way to do this. However, these wet masks and their waterproof packaging often contain plastics and preservatives. Now, a study reports a dry-packaged hydrating facial mask that is made of biobased and sustainable materials.
Read more …A more eco-friendly facial sheet mask that moisturizes, even though it's packaged dry
Teens from larger families have poorer mental health than those with fewer siblings, according to a large analysis of children in the United States and China. The details of the pattern vary depending on factors such as the spacing of sibling ages and the age of the siblings. But the fact that the overall pattern was found in both countries is striking.
Read more …More siblings mean poorer mental health for teens