...returned to the hooks and nets of happy anglers and boosted the local economy. The problem is culverts, those corrugated metal tubes providing transport to flowing water that must be crossed by roads. Built properly, they pose no impediment to migrating...

...drill. Then, the scientist said, the park service inserts an electrical conducting rod, and notes which parts of the metal tube are covered by ice, snow and water. He compared the process to planting a measuring stick in the glacier. "It's...

...sailboat, the Reliance, tied up to the greenhouse, which will be covered by double-walled plastic stretched over metal tubes. Warm air will circulate between the walls as insulation. Generators will provide 12 hours of light in the winter...