The Number of the Day: 58,000
At the levels of radioactive iodine-131 and cesium-137 currently being reported out of Japan, a person would have to drink 58,000 glasses of milk in order to increase their lifetime cancer risk by 4 percent.
Related Fact: For those with a lactose intolerance, that level of contamination could also be reached by consuming roughly 820 pounds of spinach.
[Source: NPR. See previous Numbers of the Day here.]