In the grand scheme of things, wanting to know how high up into the air you can shoot colorful goo-like foam probably doesn’t count for much (read: it doesn’t, not at all). But one former NASA ...

Take 52 litres of hydrogen peroxide, 10 litres of potassium iodide and a few bottles of dish soap and you create — unofficially — the world's largest elephant toothpaste. Elephant toothpaste is a ...