Salt flats are dried-up desert lakes. They form in closed hollows where rainfall can’t drain away. In a wet climate, a lake would form but, in a desert, the water is heated and evaporates into vapour faster than it is replenished by rain. The salt and minerals dissolved in the water are left behind as a solid layer. Some salt flats are massive. Bonneville Salt Flats in Utah, USA, were formed by the evaporation of an ancient lake as large as present-day Lake Michigan. They are flat enough to be used as a raceway for setting land-speed records.
Venus flytraps, like the rat-eating carnivorous plant featured in issue two, tend to grow in boggy soil that’s low in nutrients, hence they need to find another source of food to sustain them, namely insects that happen to land on … Continued