What does ob in front of a date mean?

Has Tenzing Norgay died? Do meerkats live in the Sahara desert? How many states is the Yellowstone park in? Why do few people live in the desert? What is the principal river of England? What makes up a river system? How long would it take to walk across the gobi desert? What is the toll for the mid bay bridge? Which body of water is located east of the united kingdom? Look at michelangelos last judgment,painted on a wall of the sistine chapel more than 30 years ago after he finished his ceiling paintings. in what way in yhis painting dofferent from the ceiling paintings? What is the measurment in dam capacity? What continent is Lake Baikal located in? What is a river that flows near New Orleans la? Is the royal gorge bridge for people or cars? Why would the Sahara have a brownish color when seen in space? What region can the ozarks be found? Africa country near the Black Sea? When was the throgs neck bridge built? How did the panama canal boost confidence? How would the destruction of the Amazon rain forest hurt the earth?