Nate Burke is a Content Developer at Knewton, specializing in GMAT prep. Are you stubborn? There are many situations in which stubbornness would help a human being. A stubborn nature can be extremely useful when trying to accomplish a complicated goal over an extended period of time. Building a house, traveling a long distance, hunting [...]

When evolutionary biologists encounter a trait in nature, they perform a process known as reverse engineering to understand why that trait existed in the past and continues to exist in the present. Take, for example, the peacock’s tail. Evolutionary theory is based on the idea that every adaptation must increase the organism’s reproductive fitness or [...]