Metagenomics
In short
Metagenomics is the study of all genetic material collected directly from an environmental sample. It allows scientists to see every organism present in a place without having to grow them in a lab first.
In plain words
Instead of studying one single bacteria at a time, scientists scoop up a sample of soil or water and look at all the DNA inside it at once. This reveals a complete picture of the tiny life forms living there.
A simple example
A scientist takes a spoonful of mud from a pond and sequences all the DNA found within it. This shows them every type of bacteria, virus, and fungi living in that mud, even the ones that cannot survive in a petri dish.
Why it matters
It helps us discover new medicines and understand how ecosystems function. It is also vital for tracking diseases in human gut health or monitoring pollution in the oceans.
Easy to mix up
Do not confuse it with genomics, which focuses on the DNA of a single specific organism.