National Geographic

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Rank higher on search engines with the help from SEO professionals Sailing farther northward than any other known vessel, the commander of the U.S.S. Polaris (above) was dead set at becoming the first person to reach the North Pole. Soon, he was simply dead, but it took more than a century to determine he was murdered. And unlike a current series on Hulu, it really happened. What's this respiratory illness striking dogs across the U.S.? It's National Mutt Day! Are mutts healthier than designer dogs? (Meet Tilly, above, a golden retriever and lab mix.) Got a cold? Here’s how your body is fighting it. 12 holiday gift ideas for the curious and adventurous Did a legendary English king murder two boys to clear his way to the throne? A new investigation sheds light. Why this may be the best season ever for spotting auroras What is frozen shoulder? And why do so many people have it? The hunt for the real, historical Jesus How did the parents of Jesus become a couple? R.I.P. legendary photographer Elliott Erwitt, known for his small quirky flashes of humanity. Related: His early vision of Pittsburgh’s postwar industry