Microbes are an integral part of most, if not all multi-cellular organisms. In fact, these organisms are the way they are because of the tiny partners they house within and on them. These microbes constitute the microbiome: an “invisible organ” weighing approximately 2.5 to three kilograms in an adult human and much more in larger animals.
Click here for original story, How microbiomes and the smells they produce help shape behavior in bugs, birds, animals and humans
Source: Phys.org