Sometimes an audience member will ask instead whether hummingbirds have any PREDATORS, to which we again reply that humans play a role--principally by allowing feral cats to hang out where hummers feed and nest.
Pebble tools are among the earliest known man-made artifacts, dating from the Palaeolithic period of human history.
A beach composed chiefly of surface pebbles is commonly termed a shingle beach.
Drilled Wells A drilled well is usually a deep and narrow shaft that is usually drilled with a machine, though occasionally hand drilling methods can be used.
At the surface, a drilled well resembles a pipe sticking out of the ground a few feet. Typically you’ll be getting water from one or more aquifers that are deeper than the top aquifer.