Ice does two things to a landscape: it removes material from where it flows and deposits it where it stops. Almost every feature below is one of those two, and…
Buffer time is insurance, and like any insurance the right amount depends on what the loss would be rather than on how likely it is. Here are ten considerations that…
The tissue is dense and most flavour molecules are large, so the liquid stays near the outside. Once that is understood, what a marinade is good for changes completely. Here…
Two materials are held apart in a state where one wants to give up electrons and the other wants to take them, and the separation is the entire trick. Here…
The film is not a solid thing. It is a layer of water held between two surfaces, and everything a bubble does - its shape, its colours, its lifespan and…
There is a picture most people have of a watermill that misses the part that mattered.
The picture is a wheel turning in a river, driven by the current —…