200,000: estimated number of casualties caused by the bombings of Hiroshima and Nagasaki almost 70 years ago. After the bombings, Popular Sciencepublished a statement that discussed the long-term implications of the "Annihilation Bomb."
160 degrees Fahrenheit: the temperature of the Grand Prismatic Spring in Yellowstone National Park. A camera-equipped drone crashed into the 121-foot-deep water this week.
505: the average number of tornados that occur every year. New research indicates that climate change may be making twisters less frequent but more deadly.