Atmospheric Mercury Has Declined — But Why?

The amount of gaseous mercury in the atmosphere has dropped sharply from its peak in the 1980s and has remained relatively constant since the mid 1990s. This welcome decline may result from control measures undertaken in western Europe and North America, but scientists who have just concluded a study of atmospheric mercury say they cannot reconcile the amounts actually found with current understanding of natural and manmade sources of the element.

Researchers identify best hours for shut-eye when sleep must be limited

People getting a minimal amount of sleep do better if they go to bed early in the morning rather than late at night, suggests Stanford University Medical Center research. A recently published pilot study on the effects of sleep deprivation also found that individual tolerance of sleep restriction varies widely, yet study participants had a better overall adaptation to early morning sleep.

Dietary fat intake affects hidden stomach flab

You literally are what you eat, at least when it comes to the amount of abdominal visceral fat, Johns Hopkins researchers say. Studying the food diaries of a group of middle-age adults, they found that the more saturated fats such as butter and lard the group ate, the higher the amount of visceral fat surrounding their internal organs. By contrast, a diet of more polyunsaturated fats like vegetable oils yielded lower visceral fat.