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Salvaged Trees Become Living-Roof Garden Arbor

Jeremy Harper is used to making something out of nothing. For 20 years he has worked as an arborist and site clearer which has taken him across the United Kingdom, often repurposing would-be waste materials and giving them a new lease of life. But he admits that he has surprised himself with a personal project to build a living arbor …

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Climate may have defeated Mongol invaders

Climate fluctuation not only may have paved the way for Genghis Khan’s conquests of Asia in the 13th century, sudden climatic change may also have halted the Mongol invasion of Europe, according to new research. Two scholars − one skilled in historical documents and another in interpreting tree rings to deliver weather reports through history − say that cold and heavy snowfalls …