Want a powerful career? A biologist's work is literally the stuff of life. These scientists study living things like people, animals, and plants, with a goal of trying to understand how their bodies work and how they respond to the world around them. Biologists typically specialize in a certain area: Ecologists look at the environment, zoologists work with animals in captivity, and marine biologists focus on underwater species. If you choose to enter this field, you'll have many job options—think teaching, doing research for a government agency, or working at a private company. Biologists often combine traditional laboratory experiments with field research (which sometimes requires travel), and they also need strong writing skills so they can report their findings clearly. One of the most awesome things about this kind of work is the chance to use your smarts to improve the world: For example, by studying the basics of plant anatomy, a biologist can then use her knowledge to grow a fruit that's less likely to be munched on by bugs, thereby reducing the need for pesticides. Not too shabby, right?