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A great comic book cover is an advertisement, a work of art, a statement, and an invitation. A great comic book cover is a glimpse of another world through a canvas no bigger than a window pane. In Best Comic Book Covers Ever (This Month), we look back over some of the most eye-catching, original and exceptional covers of the past month. August offers a feast of shape and color, with striking covers by Scott Fischer, Victor Santos, Chrystin Garland, and Tula Lotay, some bold juxtaposition, and a quirky take on a pulp archetype or two -- including a Nazi airship and some poor sap being held in a giant hand. It's a classic!

According to researchers, the sperm counts of European and American men have been steadily falling over the last 50 years. Scientists believe environmental factors are contributing this decline.  Warm baths, nicotine and alcohol have always been sperm killers, but new threats such as the heat generated by a cell phone placed in a pocket or a notebook computer placed in the lap are also impact