Proper brushing takes at least two minutes — that's right, 120 seconds! Most adults do not come close to brushing that long. To get a feel for the time involved, try using a stopwatch. To properly brush

Mercury (Hg) is a persistent bio-accumulative toxic metal with unique physicochemical properties of public health concern since their natural and anthropogenic diffusions still induce high risk to human

It's the smallest cat in the Americas, occupying the smallest area of land. Listed as vulnerable to extinction, the güiña wildcat of Chile has lost much of its natural home as forests are chopped down