For centuries, people thought sap had to flow down a tree's body through a spigot at the bottom. But researchers have discovered that sap can flow upwards, too, which allows syrup production from much younger trees, and could even turn maple syrup into a row crop.
The department's final environmental assessment of the Keystone XL pipeline found that blocking the project probably wouldn't stop the development of Canada's tar sands. But the review didn't endorse the pipeline either. Secretary Kerry — and, ultimately, President Obama — will have the final say.
The dredging operation is part of a plan to expand a coal port in Queensland. Environmentalists have warned that dumping sediment could kill off delicate corals, but park officials said dredging would be "subject to strict environmental conditions."
Research explores the consequences of boosting self-esteem when it is not justified. When self-esteem is artificially boosted, it reduces performance and effort — as people seek to protect the fragile gain in self-esteem by withdrawing from effort and the risk of failure. When self-esteem is diminished without justification, people appear to work harder to retrieve lost feelings of self-worth.
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