We talk to Dr. Susanne Klaus from the German Institute of Human Nutrition (DIfE), Potsdam.
Brown bears have largely vanished from Europe over the past 12,000 years. One reason: warmer winters discouraged females from bearing cubs as they used energy to sleep rather than go into deep hibernation in the cold.
US scientists have found out that the impaired mice lose a significant portion of their body weight - and not because they eat less. The study's head researcher calls it one of his lab's "most interesting discoveries."
They may not look like much, but the little acorns that litter the forest floor in fall can mean the difference between a life of plenty and one of hardship
Malawi faces a hunger crisis triggered by drought and poor harvests. Yet the country also has a small but growing problem with obesity. One hospital sees more that 50 hypertension or diabetes patients a day.
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