Ancient DNA analysis unlocks secrets of Ice Age tribes in the Americas Research

Scientists have sequenced 15 ancient genomes spanning from Alaska to Patagonia and were able to track the movements of the first humans as they spread across the Americas at “astonishing” speed during the last Ice Age, and also how they interacted with each other in the following millennia. Continue reading “Ancient DNA analysis unlocks secrets of Ice Age tribes in the Americas Research”

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Exercise might improve health by increasing gut bacterial diversity

Bacteria, often synonymous with infection and disease, may have an unfair reputation. Research indicates there are as many, if not more, bacterial cells in our bodies as human cells, meaning they play an important role in our physiology (1). In fact, a growing body of evidence shows that greater gut microbiota diversity (the number of different species and evenness of these species’ populations) is related to better health. Now, research published in Experimental Physiology has suggested that the efficiency with which we transport oxygen to our tissues (cardiorespiratory fitness) is a far greater predictor of gut microbiota diversity than either body fat percentage or general physical activity. Continue reading “Exercise might improve health by increasing gut bacterial diversity”

Prehistoric food globalization spanned three millennia

Since the beginning of archaeology, researchers have combed the globe searching for evidence of the first domesticated crops. Painstakingly extracting charred bits of barley, wheat, millet and rice from the remains of ancient hearths and campfires, they’ve published studies contending that a particular region or country was among the first to bring some ancient grain into cultivation. Continue reading “Prehistoric food globalization spanned three millennia”

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