Why do we do good things for one another? Do we still do good things if we get nothing in return? This reader explores the science, impulses, and reasons behind altruism in both humans and animals. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 3007.

Discover the many mysteries of the sea - shipwrecks and sunken treasure, deep sea creatures and mythical monsters - and how people explore this amazing place. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2730.

How do you travel? By plane, boat, bicycle…elephant? Discover the many efficient and unusual methods people have invented to get from place to place. Use your unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2685.

Gold is valued by many cultures for its beauty and durability, but things can get ugly when gold is involved. This reader examines the long and troubled history of gold in different parts of the world. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2499.

Discover the history of boxing, from the ancient Greeks to Daniel Mendoza to Muhammad Ali. Find out why this wild and thrilling sport has been entertaining us for years! Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2710.

In 2010, 33 miners were trapped inside a mine for 69 days. This reader investigates the complicated rescue mission, the difficulties of life underground, and - most of all - how the miners' families never stopped hoping for their safe return. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 3056.

Can thinking happy thoughts help people overcome their fears? This reader examines the phenomenon of the "placebo effect" in helping people cope with health problems and fears. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2729.

Mummies, coffins, tombs, elaborate funerals with fireworks…explore the many ways people deal with death. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2853.

Is a tomato actually red? Should you wear white on your wedding day in China? Explore how we see colors, how colors make us feel, and what colors mean in our cultures and celebrations. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2686.

Humans have never been content to just stay on the ground. Learn about the history of flight from the early planes of the Wright Brothers to the thrilling sport of BASE jumping. Use your unique code in the book to access the online reader, complete with videos and interactive exercises. Word count: 2810.