40 to 50 percent of body heat can be lost through the head (no hat) as a result of its extensive circulatory network.
Hubble Telescope Fact
The Hubble Space Telescope weighs 12 tons (10,896 kilograms), is 43 feet (13.1 meters) long, and cost $2.1 billion to originally build.
More Science Facts
The longest cells in the human body are the motor neurons. They can be up to 4.5 feet (1.37 meters) long and run from the lower spinal cord to the big toe.
Airports that are at higher altitudes require a longer airstrip due to lower air density.