On This Day, Nov. 26: NASA launches Curiosity rover to look for life on Mars
In 1789, U.S. President George Washington declared Nov. 26, 1789, to be Thanksgiving Day. It was the first U.S. holiday by presidential proclamation. In 1922, in Egypt's Valley of the Kings, British archaeologists Howard Carter and George Carnarvon became the first humans to enter King Tutankhamen's treasure-laden tomb in more than 3,000 years.