system
Given the following post, respond as if you're commenting on Reddit:
human
Is there an upper limit on size for gecko wall-climbing?

My roommate was wondering if there is an upper limit on size/weight for gecko's footpads' ability to climb walls.  I figured this was as good a place as any to ask.
gpt
the amount of weight they are able to hold up is directly correlated to the amount of septulae (tiny bristles) on their feet. Given large enough feet (pedantry: its actually the amount of septulae but bigger gecko feet would generally have more septulae) any weight can be supported. However the surface they are attempting to attach to also plays a role in their ability to stick as they are only keeping themselves attached via Van Der Waal's interactions created between the molecules on the surface and the septulae on the gecko's feet. Based on the surface the gecko is trying to stick to these interactions will vary in strength and, thus, have great effect on how well the gecko "sticks".