Food chains, also called food webs, food networks and/or trophic networks, describe the feeding relationships between species to another within an ecosystem. Organisms are connected to the organisms they consume by arrows representing the direction of biomass transfer. Typically a food chain or food web refers to a graph where only connections are recorded, and a food network or ecosystem network refers to a network where the connections are given weights representing the quantity of nutrients or energy being transferred.

Americans spend more than $400 billion a year eating out, and behind each burger, turkey sandwich, and ice cream sundae is a simple decision that could help you control your weight-and your life. The problem is, restaurant chains and food producers aren't interested in helping you make healthy choices, in fact they invest $30 billion a year.

Americans spend more than $400 billion a year eating out, and behind each burger, turkey sandwich, and ice cream sundae is a simple decision that could help you control your weight-and your life. The problem is, restaurant chains and food producers aren't interested in helping you make healthy choices. In fact....

US farmers have been given the go ahead to produce cloned meat for the human food chain. In a 968-page report billed as a "final risk assessment" of the technology, the US Food and Drug Administration has concluded that healthy cloned animals and products from them such as milk are safe for consumers.

Once again, it’s a weekend battle of head-to-head stars and this week is positively titanic in scope. We've got two monumental talents whose genius and charisma have propelled them both to the very top of the Hollywood food chain. In this corner, we have funnyman-turned-producer, writer, director and, almost I forgot, back-to-back Oscar ...

"This amounts to deception on a large scale," a spokesman said. "This is not just accidental contamination, hundreds of thousands of tonnes of GM grain are being used to produce our food each year. "Biotechnology companies have clearly used imported animal feed as a 'Trojan horse' to introduce GM into the UK food chain."