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.

millions of years old? Sounds like LiveScience-Fiction. It's under 15 feet of dirt. No way to know how old it is. These scientists should get a job working on a farm. They'd learn a lot about dirt.

NOAA National Centers for Coastal Ocean Science researchers have identified potential effects of the commonly used herbicide atrazine on phytoplankton—free-floating algae forming the base of the food chain

Barber's story was harder to swallow than a super-sized Big Mac meal. So what are we to make of Arthur Hoyte, a retired physician from Rockville, Maryland, who is suing KFC because he thought fried chicken was a health food? In a lawsuit sponsored by the Center for Science in the Public Interest, Hoyte claims he had no idea the restaurant chain

The popular view of our ancient ancestors as hunters who conquered all in their way is wrong, researchers have told a major US science conference. Instead, they argue, early humans were on the menu for predatory beasts.