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Brambles are a common reminder that nature is not just about us. The tangled confusion of spikes and tough stems tear flesh and cloth alike - the long, sinuous creepers creeping along tracks can trip those whose eyes stray from the ground. Tales from Brambly Hedge tempt children to the underworld of the bramble where homely mice families create a secure glow of domestic bliss safe from the dangers outside. Picking blackberries remains very popular and a wistful childhood memory, captured by Seamus Heaney's poem Blackberry Picking. This also echoes the dual nature of the bramble as both tormentor and giver of soft treats. Another dark side to this very common plant is the clues it gives to forensic botanists who use the bramble as an indicator of changed ground, noting if its growing pattern shows signs of disturbance, they can even detect the time the plant was dug up and recovered.The bramble is the commoner of the woodland, but says Richard Mabey, it performs an essential job in protecting young trees. Today BlackBerry is a smart phone, called after the fruit because the inventors knew that any name related to the term "email" made people's blood pressure rise, so they went for a natural, playful, happy-memory inducing name. It has now been twisted into urban slang - "going blackberry picking" now means to go out and steal phones. The humble blackberry, and there are over 650 different species, has many hidden depths.