Science shorts. Two superheroes battle it out in a ground-breaking experiment. Bags containing different substances are dropped to see which bag will damage paving stones the most. Show more
Discover 11,128,835 listings and 280,216 playable programmes from the BBC
Science shorts. Two superheroes battle it out in a ground-breaking experiment. Bags containing different substances are dropped to see which bag will damage paving stones the most. Show more