Of all naturally occurring phenomenon, asteroid impacts are one of the most destructive of all. The impact of an asteroid releases as much… more »
Top Ten Longest Rivers in the World
Nearly all ancient civilization proposed in fertile river valleys. They were as critical to ancient societies as they are today. They provide water for agriculture,… more »
Ten Facts About The Drought
The drought currently affecting the United States is one of the worst in history. Many people don’t realize the severity of the situation.… more »
Ten Most Interesting Facts About Mars
There has been a lot of hype lately surrounding the Red Planet. NASA was recently successful in landing the Curiosity rover on the planet’s… more »
Top Ten Tallest Mountains in Colorado
The tallest mountains in the state with the highest average elevation, Colorado, are: