There are a huge number of viruses living inside animals, plants, and even our own bodies. They are the most abundant biological entity on earth, and we only know about some of them.
Of the viruses inside the human gut, a fraction are what biologists call “viral dark matter.”
Identifying these mysterious microbes may uncover the cause of disease, prevent a pandemic like the coronavirus / Covid-19 or even reveal a new life form.
(Source: Bloomberg YouTube channel)