control A part of an experiment where there is no change from normal conditions. The control is essential to scientific experiments. It shows that any new effect is likely due only to the part of the test that a researcher has altered. For example, if scientists were testing different types of fertilizer in a garden, they would want one section of it to remain unfertilized, as the control. Its area would show how plants in this garden grow under normal conditions. And that gives scientists something against which they can compare their experimental data.
Fiona Oakes is a passionate vegan (since teenage) who runs an animal sanctuary almost singlehandedly. She is also a elite marathon runner with top level finishes at prestigious marathons. She holds three marathon world records and is the fastest female to complete a marathon on each Continent. She holds the course record at the North Pole as well as the Antarctic Ice Marathon and has a personal best of 2hrs 38mins. She has completed the 2012 Marathon des Sables, a 154 mile event across the sand dunes of the Sahara in extreme heat.