Maybe :)

To elaborate, there seems to be a difference between physical curiosity and intellectual curiosity.

Many mammals, especially when young, are very curious about their environment, peeking, sniffing, burrowing in the ground etc. So are human children.

But the ability to ask more abstract questions "why do the stars shine?" does seem to be limited to humans alone, and maybe not even all humans. And it is very uncertain if archaic humans had it as well.