Visitors view the AIDS Memorial Quilt at the National Mall in Washington, D.C., where the International AIDS Conference is being held this week. Ebony Bailey/NPR hide caption

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Testing, Treatment Key Weapons In AIDS Fight

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Days to Come Bonobo & Bajka

There are millions of killers loose in California, and eucalyptus trees are their victims. Entomologist Timothy Paine has been studying the insects killing California's menthol-scented trees for two decades — and he's noticed a suspicious pattern. George Rose/Getty Images hide caption

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Invasive Pests, Or Tiny Biological Terrorists?

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