I have to say I'm not sure.
The possibility of a higher power - or a God (conventional one or not) - is plausible but in order for me to answer that I believe there is a higher power, I would have to be referring to 'aliens' or a more advanced race somewhere in the galaxy.
And while tehy may encompass a greater intellectual capacity I'm not sure if this qualifies as a higher power per se hence my 'not sure' answer.
Religion is something I don't subscribe to though.
At the core of my principles I believe human beings are essentially equal & that there is nothing greater than us. By the same token, I tend not to think we are anything superior to animals, irrespective of differences in intelligence.
As this is the case, I have an inherent problem with the idea of worshipping. Having respect & admiration is one thing, but getting on your knees to bow before a 'God' has an air of slavery to me.
Anyways, getting a little off track here so I'll just end by reiterating my answer that, I'm not/can't be sure.