Which is a key qualification for someone who assembles scientific engineering products?

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.

Many citizens are in danger of contracting a food-borne illness.more people are living with chronic illnesses.pathogens are becoming stronger and harder to defeat.