A course of 18 lectures by Professor Paul Rosenzweig.

History is made not only by kings, queens, presidents, and generals, but equally by inventors and the technological powers they unleash. This course explores the inventions that have changed the world from prehistoric times to the 21st century. Along with recounting famous inventions such as the steam engine, airplane, atomic bomb and computer chip, these lectures explore a number of surprising innovations, including beer, pagodas, indoor plumbing...

"For thousands of centuries, humans lived near the ocean, wandered right up to its edge, and turned back to the relative safety of the known land. Even when we invented ships and the very bravest among us sailed out, our fears and imaginations took over. What creatures could be living in the unknowable darkness, the bottomless depths? Giant worms, microorganisms that eat metal, faceless fish, giant sea spiders? Marine life is even more otherworldly...

"Join a Mayo Clinic expert to examine the scientific facts behind integrative medicine therapies and learn how they complement conventional medicine"--Container.

In their astonishing physiology and behavior, birds are among the most ingenious and resourceful of animals, and a marvel of our natural world. In these 12 lectures, you'll discover the remarkable beneath-the-surface world of birds: their evolution, underlying science, and fascinating lives in the wild, through key subject matter such as: The Miracle of Flight-Learn how a bird's wings operate as an airfoil, producing lift, thrust, and drag, and how...

An authoriative guide to the mathematical shapes around us: how they're formed, how they're studied, and how they're applied to our everyday lives. With these lectures presented in three parts you will discover the intricate relationship between mathematics and nature, get a pointed introduction to the language mathematicians use to study shapes and dimensions, and learn how to finally make sense of this abstract intriguing subject.

Clifford loves to help others! Clifford and Emily Elizabeth want to do good deeds every day. They try to help a woman painting her fence, a man with a flat tire, and a kitten stuck in a tree. But every time Clifford tries to help, something goes wrong. Then Clifford sees two kids in trouble! Can they save the day after all?