Can Polar Bears Climb Up Walls?

Simple: One of these is minecraft 1.10. The other is 1.9.4

Because there still needs to be a mob there, so you aren't taking damage from nothing or w/e, Polar Bears are spiders to people who aren't in 1.10.
 
*Clears Throat* As a bear and bear enthusiast, I would like to point out that we in the bear community have been facing an identity crisis the likes of which we can no longer bear. It is pawsitively destroying families and it needs to end. These "Spider bears" are nothing more than what we call a phase most teenage bears are going through.
"its not a phase mom its who i really am"