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...open spaces like forests or wetlands that are strategically managed to protect downstream water supplies. If these natural areas are lost to urban sprawl, converted to farms, or are otherwise degraded, city water supplies are more likely to suffer shortages or become polluted. When managed properly, natural infrastructure directs more clean water to cities by controlling...

...Open University's Science courses and qualifications [Black necked storks] During the long history of life on Earth, the generally slow pace of evolution has been punctuated by dramatic mass extinction events, during which, over a relatively short period of time, a very large number of species became extinct. There are thought to have been five such events, of which the...

...Open University's Science courses and qualifications. There’s an idea circulating that humans are the only animal to experience sexual pleasure; that we approach sex in a way that is distinct from others. As with many questions about sex, this exposes some interesting facts about the way we discuss the subject. [Snails having sex] On one level, the question of whether...