Changes in the gut microbiome might alter the way a developing body stores and burns calories, leading to long-term weight problems.
We all trail a personal cloud of bacteria, viruses, fungi, plant particles, chemicals and even microscopic animals.
An outdoor pet tracks in loads of bacteria that may help children avoid allergies later in life.
Antibiotics may impact the development of more disease types than previously believed.
Researchers learn that these tiny microbes play a larger role in human health than ever before imagined.