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Managing fisheries to maximize profits got a bad name in the 1970s after an economist concluded that overexploitation, even to the point of causing a stock to go extinct, is a definite possibility when fishers are pitted against each other and are attempting to maximize profits.

This morning’s groundbreaking for the Pacific Connections Garden, the largest garden added to the Washington Park Arboretum since its founding, was preceeded in recent weeks by the moving of holly trees and shrubs — some as tall as 30 feet — and by a plant collecting expedition to Oregon’s Siskiyous, the first in a series of expeditions to bolster plant collections for the new garden.

A heat-loving microbe capable of fixing nitrogen at a surprisingly hot 92 degrees Celsius, or 198 Fahrenheit, may represent Earth’s earliest lineages of organisms capable of nitrogen fixation, perhaps even preceding the kinds of bacteria today’s plants and animals rely on to fix nitrogen.