1 Lumber prices can change daily, affecting the total cost. 2  CostHelper readers report paying $1,800-$8,500 to have a handyman or casual labor install a pressure-treated wood deck, or $8-$23 per square foot. 3  Readers who hired a decking contractor report paying $4,400-$20,000, or $16-$50 per square foot.
Pruning is a process that is more important than was once believed. Experiences during infancy and childhood form the connections that shape the development of the brain. Pruning is a key part of brain development because it eliminates the connections that are not used often enough.
Triune brain. The triune brain is a model of the evolution of the vertebrate forebrain and behavior, proposed by the American physician and neuroscientist Paul D. MacLean. MacLean originally formulated his model in the 1960s and propounded it at length in his 1990 book The Triune Brain in Evolution.