After completing a 200 million dollar study, NASA reported that a colony could be dug several feet below the moon's surface to protect residents from high energy cosmic radiation, which can damage DNA and cause cancer. ... Over the past 2 decades, scientists have found over 1,800 exoplanets, and studies suggest the universe holds about at least 100 billion more. ... Readings showed a significant amount of hydrogen in the top few feet of the surface of Mars, an indication of an abundance of ice that was once liquid, meaning Mars used to have a much stronger, warmer atmosphere that was capa...

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

The greenhouse effect as stated in the dictionary is the effect produced as greenhouse gases allow incoming solar radiation to pass through the Earth's atmosphere, but prevent most of the outgoing infrared radiation from the surface and lower atmosphere from escaping into outer space. This process o...

• Word Count: 3240
• Approx Pages: 13
• Grade Level: Undergraduate