Humans have always had a desire to learn about the world around them. They have performed weird science experiments with the intentions of solving some of the most challenging questions. Scientists will perform experiments to test theories, make important discoveries or to demonstrate a known fact. Regardless of the purpose for scientific studies, some are considered to be unethical.
Apes have been observed creating and experimenting with their own tools. For example, they have been seen sharpening a stick to use as a weapon. However, they can make all of the tools they want without dealing with any criticism from other apes. For humans, this is not always the case.