A single-pixel GIF file set to a transparent status and thus invisible. Also known as a "transparent GIF," "1-by-1 GIF" and "clear GIF," it is is used as a tracking mechanism for Web pages to monitor ...
Slice by slice, these images of a human brain are perhaps the clearest ever produced. To get their resolution down to a tenth of a millimeter, researchers at Massachusetts General Hospital used a ...
In 2010, the sporting world was plagued by invisible daemons, obstacles, and mere troublemakers. These five GIFs serve as evidence. The Wizards' JaVale McGee is really tall, which of course means that ...
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