Human brain folds are a highly evolved trait. Only mammals have evolved this ability and amongst them only cats, dogs, monkeys, dolphins and humans. Other animals and mammals like rats are still have their 'primitive' flat, unfolded brains.The folds in the brain of course have technical names.uman brain folds are a highly evolved trait. Only mammals have evolved this ability and amongst them only cats, dogs, monkeys, dolphins and humans. Other animals and mammals like rats are still have their 'primitive' flat, unfolded brains. The folds in the brain of course have technical names.
Depending on the type of your roof, geographic location, and the company or weekend warrior you choose to hire, the total installed cost of a composition shingles roof could vary between $2.75 to $7.50 per square foot installed.
Roofing Cost Per Square Foot. When we list the roofing cost per square foot below, we may abbreviate psf (per square foot) and ps (per square) which is equivalent to 100 square feet and is often how roofing contractors bid out jobs â on a per square basis.