Most people are surprised to learn that seeing has not yet been explained by science. Incredibly, scientists cannot even explain why some surfaces appear to be black while others appear to be white. The physical difference between a surface that appears to be black and one that appears to be white r[...]

Part of Starting Science, a general science course, this title is designed for use in mixed-ability classes. It is divided into units which are presented at three levels of difficulty. It includes explanations of scientific concepts that are set in everyday contexts, along with a range of questions [...]