Since its early history, Jerusalem has been a fully walled city. The walls are over 40 feet tall, eight feet thick, and 2.5 miles long. It also has 34 watchtowers and seven main gates to let traffic through. (Last in series).
Of the 7 billion people in the world, 22% (1.6 billion) fast during Ramadan.
Common plastics have a life expectancy of 450 years in seawater.
Clocky is a type of robot alarm clock. It runs away from you so that you have to get out of bed to turn it off.
Companies in India and Europe are already working on building the actual tubes and pods for Hyperloop tracks, while two start-up companies in the United States are exploring its development as a public transportation system.