Today Henry meets a sleepy Bear in the woods. It's almost winter so it's time for Bear to hibernate but he’s having trouble falling asleep. So Henry becomes a Park Ranger and reads him a bed time story that sends him off to sleep.

In his time, Mark Twain was considered the funniest man on earth. Yet he was also an unflinching critic of human nature, using his humor to attack hypocrisy, greed and racism. In this series, Ken Burns has created an illuminating portrait of the man who is also one of the greatest writers in American history.

Scientists have spent centuries trying to discern how we make choices. This course looks at the cutting-edge research revealed via the scientific method to understand and explain the human decision making process. You'll better understand the choices you face every day, the tools you can use to make the best decisions for your personal goals, and how to influence the decisions of others.

Revisit the nuclear energy binding curve, noting that most elements lighter than iron can release energy by fusing together. This is an even more energetic reaction than fission, and it is what powers the sun. Follow the development of fusion weapons and the so-far-unrealized dream of fusion reactors.

Track the historical significance and changing fortunes of the Grand Canal. Beginning in the Sui Dynasty, explore the evolution and engineering of the canal system and its vital role in imperial economics, politics, and culture. Learn about its maintenance and management, its varied personnel, and how the health of the canal directly mirrored the political health of the empire.

Even as children, we learned that the way in which we presented a choice to our parents was often as important as the specific question we asked. Decision science reveals just how that tool - decision framing - can be used to our benefit, and how it is used to manipulate our choices as consumers.

Zap decides he wants to walk on the moon and Bop builds him a set of wings, but they don't seem to work. Zap's friends decide if they can't get zap to the moon they can bring the moon to Zap.

Jacob reluctantly agrees to do some volunteer to work at the veterinary clinic of Dr. Leduc.

Why do we grieve the loss of loved ones? Is there an evolutionary reason for it? And why does grief leave some people devastated while others move on quickly? Explore these questions and more. Also, learn strategies from brain science for dealing with - and helping others deal with - the pain of great loss.

Ziggy orders a special magic cloak that will make him invisible, but when the cloak doesn't work his friends pretend that they can't see him.