Making the most essential science required for survival in this modern age friendly to persons from 8 to 80, is the modest yet ambitious aim of this book. From the science behind words in daily use, such as, A.C, fever, fuse, monsoon, sugar, etc., to the latest scientific ones like clone, chip, black hole, RDX and Greenhouse Effect, the book acquaints a lay reader with most of the dimensions of science through more than 800 entries. In simple language, short sentences, with helpful illustrations and without technical jargon, this handy reference book gives a glimpse into the present day science. It could serve well to brush up one’s general knowledge on understanding on science to stay ahead of others in this competitive science driven world.