... a subject of wide interest because it is commonly believed to be a prerequisite for extraterrestrial life. Many scientists infer that liquid water once covered large areas of Venus and Mars. Water is thought to exist as liquid beneath the surface of planetary bodies, similarly to groundwater on Earth. Evidence suggests the existence of liquids below the surface of several moons and dwarf planets ... elsewhere in the solar system. Some are suspected to be large oceans, and there is a growing list of candidates to host liquid water. Water has been very important ... locked, with one hemi...

• Word Count: 1498
• Approx Pages: 6
• Has Bibliography
• Grade Level: Undergraduate

... as an extremophile. Extremophiles are microorganisms that can live in the most harsh environments known to man. For example, most bacteria need a suitable environment to live in, usually one with water. An extremophile could be found living at the bottom of the ocean floor where most other microorganisms would die. With this in mind, scientists believe that extremophiles may be living ... live in harsh environments where the essentials for life may not be present. "He grounds them in what life apparently requires: lots of carbon, about 20 other elements, liquid water, and an energy sour...

• Word Count: 1802
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate