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The Tree of Life may be a bush

New species evolve whenever a lineage splits off into several. Because of this, the kinship between species is often described in terms of a 'tree of life", where every branch constitutes a species. Now, researchers at Uppsala ...

dateAug 18, 2015 in Evolution
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Panama declares drought emergency

Panama's government has declared a state of emergency as it faces a drought that has prompted water restrictions, depleted reservoirs and affected shipping through its bustling canal.

dateAug 12, 2015 in Environment
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