On November 26, 2011, the NASA Curiosity rover launched to Mars. Curiosity was the biggest and most powerful rover anyone had ever sent to the Red Planet. The two-ton science laboratory is about the size of a small SUV.

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,

NASA scientists are hoping to understand the history of where they found the rocks — and for evidence of ancient microbial life