An animal's ranking on the food chain depends on where its meals place on the ladder. That puts plants on the bottom (they make all their food), polar bears on top and people somewhere between pigs and anchovies.
For the first time, scientists have figured out where we sit on the global food chain. Although humans are clearly top chefs of the world, we're not the top predator. Instead, our ranking is closer to a small, smelly fish that we put on pizzas and salads.
December 8, 2013 What do 64-year-old swimmer Diana Nyad and 13-year-old entrepreneur Maya Penn have in common? At the TEDWomen conference in San Francisco, a range of speakers shared the ways innovation and ingenuity kept them young.
December 8, 2013 There's no question that people have mixed motives when they send out their cards. No doubt they want to put the best face on their own lives, offering an annual report marked more by pride, perhaps, than honesty. Christmas cards may be self-serving and smug, but they're also well-meant attempts to connect.
December 8, 2013 Freezing rain is creeping across Tennessee on its way to the mid-Atlantic as the stunning cold, snow and ice that gripped Texas and the west on Saturday makes its advance eastward.
December 8, 2013 Thousands of protesters are calling for the ouster of their president, who wants closer ties with Russia. Ukraine has seen daily protests for more than two weeks now.
December 8, 2013 That includes all living American presidents — except George H.W. Bush — as well as 26 members of Congress. President Obama has confirmed he and first lady Michelle will attend Tuesday's memorial service at FNB Stadium in Johannesburg.
December 8, 2013 The visit is the first test of an interim deal Iran struck with the West in November. International inspectors have not visited Iran's Arak heavy water production plant in more than two years.
December 7, 2013 Once the weapon of law enforcement officials, the repellent is available to just about everyone.