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The Holocene is unique when compared to earlier geological time in that humans begin to alter and manipulate the natural environment to their own needs. Domestication of crops and animals and the resultant intensification of agriculture lead to profound changes in the impact humans have on the environment. Conversely, as human populations began to increase geologic and climatic factors begin to have a greater impact on civilizations. To understand and reconstruct the complex interplay between humans and the environment over the past ten thousand years requires examination of multiple...

A guide for using body language to lead more effectively

Aspiring and seasoned leaders have been trained to manage their leadership communication in many important ways. And yet, all their efforts to communicate effectively can be derailed by even the smallest nonverbal gestures such as the way they sit in a business meeting, or stand at the podium at a speaking engagement. In The Silent Language of Leaders, Goman explains that personal space, physical gestures, posture, facial expressions, and eye contact communicate louder than words and, thus, can be used strategically to...

Outrigger systems are rigid horizontal structures designed to improve a building s stability and strength by connecting the building core or spine to distant columns, much in the way an outrigger can prevent a canoe from overturning. Outriggers have been used in tall, narrow buildings for nearly 500 years, but the basic design principle dates back centuries.

In the 1980s, as buildings grew taller and more ambitious, outrigger systems eclipsed tubular frames as the most popular structural approach for supertall buildings. Designers embraced properly proportioned core-and-outrigger...