Monthly Archives: December 2014
Extinction refers to the end of an organism. It means that all of the individuals of an organism (usually a species) have died. For example, dinosaurs are all extinct. There are many other plants and animals that have gone extinct. … Continue reading
Merriam’s kangaroo rats (Dipodomys merriami) live in the Baja Desert in southwestern America, which is very hot and dry. These kangaroo rats live in deep burrows underground, which stay cooler than outside. When kangaroo rats breathe, the moisture that escapes … Continue reading
Rain call fall between 7 and 18 miles per hour (mph), depending on wind and the size of the raindrop. Rain cannot fall faster because the friction in the air makes the raindrop fall apart above 18 mph.
There are more than 7,000 species of algae and they can live in the ocean, lakes, and rivers. Algae are grouped into three categories: red, green and brown. Brown algae is the most common of all the algae. Green algae … Continue reading
Contrary to popular belief, cracking your knuckles does not cause arthritis in your knuckles. Medicine does not know the exact cause of the popping sound; however, there are three major hypotheses (educated guesses): 1) cracking knuckles causes small air pockets … Continue reading
Cladistics is a science tool that helps scientists group organisms together based on shared characteristics, such as the presence of hair (mammals) or chlorophil (plants). Many of those characteristics are genotypes, which means the DNA that codes for the characteristics. … Continue reading