Another reminder that the world,us included, belongs to bacteria.  A human is a bacterial/mammal hybrid.  This is relevant at even a behavioural level. How often does our digestion affect our actions?

From MicrobeWorld –

A new concept is to consider human as a super-organism containing those microbes in or on human body as well [7]. There are more than 100 trillion bacterial cells in human gut, which are about 10 times more than cells in human itself [8]. Those bacteria can help digest food and harvest nutrition and energy that otherwise cannot be collected by the human body directly [9]–[11], i.e., human has obtained many genes needed for itself though these genes did not evolve in human genome.”