The term “microbiome” is shorthand for the vast and still largely unexplored worlds of bacteria, viruses, fungi and other microorganisms that inhabit every corner of the planet. Bacteria form tiny ...

NOVA: When people think of life here on Earth, they think of animals and plants, but as you say in your book, that's really not the history of life on our planet, is it? Knoll: It's fair to say when ...