First the ancient Greeks hid secret messages under their hair. Then Mary Queen of Scots completely lost her head because of a cracked code. Now computers create codes no human can crack.
An exciting new science series for young children. This book is packed with amazing fats about the seasons, Simple text, colorful illustration, and fun things to do help you discover why some places are hot all year round and why other places stay cold. Learn what a day and year are, and find out what happens to animals and plants as the seasons change.