Coming under a banner of 'edutainment' (please remember to shoot whoever came up with that), John and Dan are a pair of real, genuine scientists from London's Science Museum, who are here to teach us a thing or two.
Answering a series of random questions about science, the pair use props like liquid nitrogen and bungy cords to explain all sorts of problems, such as how did birds learn to fly; will you get wet in a cloud and has anyone handed in a pink cardigan?
The humour leans toward the adult end of the spectrum, and it gets rather cheesy at times, but the bits that are crap actually add to the geeky comedy.
I will admit to learning things, but also occasionally thinking the dumbed-down analogies miss the mark. But then if I had wanted real science rather than comic entertainment, I should have attended a lecture.