We're ready for some football here on Think Thursday. Good luck with today's mentalfloss.com Brain Game:

What do the current helmets of these 9 NFL teams have in common (that the other 23 do not)?

49ers, Bears, Cowboys, Colts,
Giants, Jets, Packers, Raiders, Saints.

Here is the SOLUTION.

THE SOLUTION:

Each feature an identical logo on both sides of the helmet.

Other teams either have no logo (Browns), logos on only side (Steelers), or different-facing logos on each side (all other teams).

Thanks for playing. Tomorrow: Free-for-all Friday!