Science

NASA employs over 17,000 people.

One of the main symptoms of a malfunctioning liver is a change in skin and eye color.

Silver also has the highest thermal conductivity, the brightest color, and the highest light reflectance among metals for visible light.

Silver occurs in nature in its native form (a rare mineral consisting mainly of metallic silver), along with sulfur, arsenic, antimony and chlorine.

There are about 200 trillion galaxies in the universe.

It is a fossilized resin from ancient trees, often prized for its natural beauty and historical significance.

The Apollo program launched 11 crew missions between 1968 and 1972.

Magma is found not only under the Earth's surface.

The fungus Ophiocordyceps unilateralis is able to take control of ants.

The Moon's atmosphere consists of 25 percent helium, 25 percent neon, 23percent hydrogen, 20 percent argon and residual amounts of methane, ammonia and carbon dioxide.