This is Wolverine and Magneto's first appearance in SMBC.

Also, Sean Carroll, Hero of Physics, is helping bring science into classrooms via donations. So, for those of you who are hoping the next generation of scientists succeeds in making flying cars and time machines, now's your chance to make a difference. For each dollar donated, I'll drink ten gallons of hot sauce. I won't show it or do anything to prove it, but it definitely will happen. Dig deep, brothas and sistas.