Desertification is a serious problem facing numerous countries in the world today. Various measures have been taken to counter the negative effects, with some providing better results than others. A...
Most people accept that anatomically modern humans first arose in Africa roughly 200,000 years ago, but the location where that monumental evolutionary event took place on the continent has been less...
North and South America had their own civilizations which flourished in pre-Columbian times. The western hemisphere’s population before the 15th century is estimated at about 100 million people...
More than 3,000 years ago, a group of people set out from the Solomon Island chain in the southwestern edge of the Pacific Ocean and steered their outrigger canoes toward the horizon, with no land as...
For over 2,000 years, ancient Pueblo peoples occupied a vast region of the south-western United States. Chaco Canyon, a major centre of ancestral Pueblo culture between 850 and 1250, was a focus for...
