Learn more about hurricanes -- why they have names, which years have had the most, and which ones have been the most destructive.

The new analysis also suggests that the annual overall number of tornadoes has remained relatively constant.

Military veterans that have suffered a blast-related brain injury may be at increased risk for developing chronic traumatic encephalopathy or CTE, a degenerative brain disease also found in people such as hockey players and American football players with a history of repetitive brain trauma.

The research appears in the 16 May issue of the journal Science Translational Medicine.