Humans are very sensitive to touch, but different parts of our body have different sensitivities. Nigel demonstrates that when it comes to our sense of touch, humans are similar to elephants.Nigel Marven sets out to discover why we are excellent at seeing some things, but sometimes miss what's right in front of our eyes.
In the first programme of the series Nigel Marven goes in search of the most disgusting , the most attractive smells and sets out to discover the biological reasons why humans eat such a diverse range of foods, from rotten raw ducks eggs to a sweaty blue cheese. At a chilli eating contest, he pushes his taste buds to the limit.
Travelling from Hawaii to the Amazon and Ethiopia and then on to the Mediterranean, Iain tells the story of the oceans – fierce waves, huge tidal bores, global currents and the future dangers of global warming.
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Volcanoes have a fearsome reputation. In reality, they are the most important force in the creation of the planet as we know it today. Iain abseils into a lava lake and cave dives in a cenote to show how the heat that fuels volcanoes also drives some of the most fundamental processes on the planet.
Presented by Sam Niel BBC 'S most popular space series
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