What revolutionary technique do archaeologists use to separate botanical remains from a soil sample?

Name: What revolutionary technique do archaeologists use to separate botanical remains from a soil sample?
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Flotation is a technique used by archaeologists to recover very small botanical remains from soil samples. By adding the soil sample to water, the organic material (such as seeds and charcoal) floats to the surface and can be collected, while the heavier soil particles sink.

What Revolutionary Technique Do Archaeologists Use to Separate Botanical Remains