Who Are the Sentinels in X-MEN? The History of the Dangerous Marvel Enemy, Explained

The X-Men attack Xavier's School in 2004's Astonishing X-Men, art by John Cassaday.

Although Stan Lee and Jack Kirby created the X-Men, not a lot of the villains they created for the mutant heroes became as iconic. Sure, there’s Magneto and the Brotherhood, and the Juggernaut. But aside […]