If you butter a piece of bread, strap it to a cat's back and drop it, which way round will it land? Our scientist investigates...
*No stunt cats were harmed in the making of this video.
What confuses you?
On Wednesday 15 May, our scientist will be clearing up your confusions on Twitter. So, in the meantime, tweet your confusions using the #ConfusedDotCom hashtag... And hopefully he'll get back to you with a video response!