The single-gene mutations directly responsible for early-onset Alzheimer's disease do not seem to be involved in late-onset Alzheimer's, and researchers have not found a specific gene that causes the late-onset form of the disease.
The NFLâs worst defense in 2015 are expected to be the Atlanta Falcons, Jacksonville Jaguars, Tennessee Titans, Chicago Bears and Tampa Bay Buccaneers (not necessarily in that order).
1. 1985 Bears. Never in the history of football has a defense intimidated quarterbacks any better. Playing with passion, ruthlessness and cunning, the 1985 Bears forced seven quarterback substitutions over the course of the season. This may have been the best blitzing team of all time.