The Science Explorer Series Level 1 Issue 2 : Little Pteranodon Is Lost by Young Scientists

There are many types of living and non-living things in the world. Man seeks to categories this great variety of living and non-living things to better understand the world in which he lives. There are common threads that connect all living things and unifying factors in the diversity of non-living things that help Man to classify them. This theme brings across the importance of maintaining diversity.