I believe if you have a chat with any good biologist they'll tell you that people occasionally discover entirely new species of plants and insects hitherto unknown to science at the bottoms of their gardens. Science only knows what gets seen and recorded by scientists, and there are a lot of small things out there that have just been missed. Not because of any sort of carelessness, but just because everyone assumes that science has found everything and that if they see something then it's already well known. You occasionally see stories of parents and children sending letters to scientists and museums asking what a bug they saw was and the answer comes back "We don't know. It's new to us!"<br><br>It's not everyone's cup of tea, but if you ever find yourself at a loss for a few hours, pick a bit of hedgerow or grass or even the cracks in a bit of pavement and take a really close look at what's living there. We all carry cameras these days so take some pictures, make some notes and then see if you can figure out what each plant and insect is. If you can't and no-one else can either then it's entirely possible you've just discovered a new species. Like the one, unique, variant of mosquitos that live on the London Underground.