How many hours a week did early foragers generally spend gathering food?

Early foragers generally spend their several hours a week when gathering food as it will take time for them to hunt and to gather supplies and foods they could find since they don’t have enough tools compared to what we have now which are more advance and has more benefits to people that the tools that they used before.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.