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What's That About?

'What's That About?' is a definitive look at the drama, science and technology of worlds few people ever get to experience first hand. Series highlights include investigating the secret science behind the morning washing ritual, where viewers will learn how - and why - chalk was added to toothpaste and aluminium to antiperspirant. Then, the secret science of cooking is unveiled as we explore how many kitchen tools once had a different use, including Pyrex, which was used in wartime to help light railroads. Plus, explore the secret science of light, and determine why there are over 30,000 types of light bulbs, some of which can keep the home lit non-stop for over a month. Uncover these scientific secrets and discover 'What's That About' - and more.