Have you ever wondered if a 12-megapixel camera phone holds a candle to the latest cutting edge smartphone with a 108-megapixel sensor? Or maybe why Google and Apple smartphones still feature 12-megapixel sensors? In the second episode of Elemental, our latest series on the smaller things in tech that make a bigger impact on the world, we tell you if megapixels mean everything, and if you can still make do with a camera that doesn't have a high megapixel count.