Now, you might think, well, we're human because of our DNA, but it turns out that each of us has about 20,000 human genes, depending on what you count exactly, but as many as two million to 20 million microbial genes.
Poderiamos pensar que somos humanos polo noso ADN, pero resulta que cada un de nós ten sobre uns 20.000 xenes humanos, dependendo do que se conte exactamente, pero entre 2 e 20 millóns de xenes microbianos.