When is a humans deepest point of sleep?

How did the normans build square keep castles? How does the River Thames change from its source to its mouth? Blue lake and rocky show you will come once more? What is the tradition gathering place for the festival of Dionysus? Are the messages of the cartoon and of the news article similar or different panama canal? What is the igneous activity in Yellowstone National Park is associated with what tectonic setting? How are pyramids all over the world similar in construction? What is the longest burp? Is there a family ticket for the London Eye? Where is the longest roller coaster in England? What is special about Mt Rainier National Park? Who were organized by the rulers to built great projects at the centers? What Controls the Shape and Motion of Sand Dunes? What does the Eiffel tower say about the French people in general? How many miles from stockton to Pacific Ocean? Is a fire is man made or not? Where is the Huber Machinery Museum in Marion Ohio located? What river forms the boarder between nsw and Victoria? How many miles from lexington KY to ocean city NJ? Which river did the Shang civilization develop along?