Medically reviewed by Brian T. Luong, DMD Smiles are often classified as "real," which are automatic and elicited by positive emotions, and "fake," which are formed purposefully, usually as a polite ...

Do you know what the splitting of white light into its different colours is called? a) dispersion b) reflection c) refraction Listen to the programme to find out the answer. Vocabulary green with envy ...

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Hazel came after him, and she’s a slightly lighter cinnamon brown color, with a very sweet little white patch on her chest.