Penguins that exchange wedding rings? A fish that doesn\"t swim? Learn all about the bizarre and unexpected behavior of animals from around the world. Use your unique code to access the online reader, complete with videos and interactive......

Sharks, ghosts, aliens, snakes... cell phones? All kinds of things make people afraid. How does our brain tell us to be afraid, and can we control fear? Use your unique code to access the online reader, complete with videos and interactive exercises.......

Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage. Animals find many interesting and efficient ways of moving.......

Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage. A triathlon is one of the most demanding races a person can......

Determining the greatest invention of all time invites the greatest debate. From the internet to antibiotics, this reader explores our most significant contributions to education, technology, medicine, and transportation....

Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage. Are humans alone in the universe, or is intelligent life......

Music has always been important to people - and some animals! Explore the many ways music affects us, from whale songs to Yo-Yo Ma. Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free......

Everyone loves a good pizza! But where did pizza begin? Is it good for us? Learn all about one of our favorite foods. Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book......

Doctors today don\"t use leeches. Long ago, there were no big drug companies. But acupuncture, an ancient practice, is still helping people. Follow how medicine has - and has not - changed over time. Use your unique code to access the online......

Water is one of the most essential ingredients for life on Earth. This reader looks at water in all its forms - in the air, on the ground, in the oceans, in our pipes - and explains how water keeps our lives moving. Use your unique code to access the......

What does the word hot mean? From the Sahara Desert to heatstroke, from temperature to emotions, learn how heat affects our world. Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free......

It\"s snot easy to find a reader this entertaining! Learn about mucus in humans and animals, and even in the laws of our countries! Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a......

Cold places, cold-blooded animals, catching a cold, getting cold feet - how many ways are there to be cold? Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the......

What are the odds that you will be struck by lightning? Attacked by a shark? Become a superstar? This reader analyzes the chances of the incredible. Use your unique code to access the online reader, complete with videos and interactive exercises.......