Why do birds play in dirt?

Why do birds like to play in dirt? When birds bathe in water or saturate themselves with dust they are actively maintaining their plumage. In well-watered areas bathing is most common, in arid ones dusting is more often observed. Experiments…

Why do i get sick so easily?

How often does the average person get sick? Adults average about two to four colds a year, although the range varies widely. Women, especially those aged 20 to 30 years, have more colds than men, possibly because of their closer…