Posted inNovember 25, 2013: Ecosystems 101

Worst place for a major mine?

Backers of Alaska’s colossal Pebble Mine, including Republican Gov. Sean Parnell, have predicted tremendous economic benefits from developing what would be the continent’s largest open-pit mine (see map at lower left). But the actual economic forecast is not that clear, and recent events might force a recasting, or even the abandonment, of the scheme. An […]

Posted inNovember 25, 2013: Ecosystems 101

The Latest: Teton pronghorn migration helped by overpasses

BackstoryFor roughly 6,000 years, Wyoming pronghorn have migrated seasonally between the mountains of Grand Teton National Park and the warmer plains of the Upper Green River Basin. The roughly 100-mile journey is among the longest land migrations of North American mammals. But biologists worry that roadways and new energy and housing development threaten to fragment […]

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