In 2011 it was estimated that there were over 8.7 million different species on planet earth, ranging from the smallest of insects to the largest of mammals. The human race has always had a deep fascination with nature and is often mesmerised by the beautiful, and often brutal, circle of life. One aspect of the animal kingdom that has always shocked and intrigued humans in equal measure is the sheer power of certain creatures. Whether it be the grace and strength of a lion or the speed and power of a Great White, humans have always had a special fascination with powerful creatures. However, it is not always the biggest animals that possess the greatest strength. Here is a list of some of the most powerful creatures on the planet. Some of the candidates might just surprise you.