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To monitor the biodiversity of a freshwater habitat, you could camp out by the water and count the rare wildlife.

To monitor the biodiversity of a freshwater habitat, you could camp out by the water and count the rare wildlife. Or you could just scoop up a cup of water. A new Dutch study has found that the DNA traces in a small sample of a body of water can reveal the species that live in it.

If you take a small sample of animal tissue and encourage it to grow in vitro , separate from the original animal's body, it is possible to create an edible piece of meat.