Resultados para "Messages" en Ciencia y tecnología

Young listeners will learn how we send and receive messages using light and sound in this accessible book. Simple text explains different methods of sending messages and shows how light and sound make sending these messages possible.

Known as the Thanksgiving Address, this Native American good morning message is based on the belief that the natural world is a precious and rare gift - from the moon and the stars to the tiniest blade of grass.

History's amazing secrets and codes—and how to crack them yourself. This fascinating look at history's most mysterious messages is packed with puzzles to decode and ciphers that kids can use themselves. Here are the encrypted notes of Spartan warriors, the brilliant code-crackers of Elizabeth...