In food chains, nitrogen isotopes become enriched as one moves higher ... Also, cut marks on fossilized bones confirm that early humans were actively processing meat. Regular meat consumption likely ...

What is a food chain? All living things including humans, animals and plants need energy to live. But, where do they get their energy from? The answer is easy - all living things get their energy ...

Global rise of large food chains linked to obesity epidemic; unhealthy food sales spike dramatically over last decade.