For nearly three decades, the web has been designed around a simple assumption:humans read pages, and machines index them.
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How to create stunning CSS card tricks
Learn how to create stunning CSS card tricks that make your website stand out. In this video, we explore interactive card ...
A version of this story appears in the September 2020 issue of National Geographic magazine. Philadelphia detected its first case of a deadly, fast-spreading strain of influenza on September 17, 1918.
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