If your doctor suggests you're the perfect candidate for some clinical trial, you might ask how much he's getting paid to recruit you.

A rare and spectacular cloud formation has been seen at the end of the polar night at Australia's Mawson station in Antarctica.

Britain and California are preparing to sidestep the Bush administration and fight global warming together by creating a joint market for greenhouse gases.

Whether in a bar or on the battlefield, it’s easier to fight knowing friends have your back. The same is true in the ant world.

What you hear depends on who you're with. Scientists have found that while many rumors can cause mistrust, gossiping can bring friends closer together.

A series of deaths involving alligators were reported in Florida this summer, but there's no need to overreact, experts say.