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By playing with the physics of wing color, scientists get a glimpse into how butterflies get their colors, and how quickly they can evolve from brown to brilliant.

Linda Wertheimer talks to USDA expert Steve Davis about fertilizer runoff in Lake Erie. Excess phosphorous fed the algae bloom that resulted in a tap water ban over the weekend in Toledo, Ohio.

The death of a merger proposal between Sprint and T-Mobile may have been bad news for the Kansas City company — stock prices dropped 19 percent Wednesday.…

The country's human rights minister tells Reuters that the dead from a massacre at Sinjar in northwestern Iraq were buried in mass graves by Islamic State fighters.

Food in supermarkets is increasingly connected to child labor and trafficking. Many laws aimed at ending these abuses overlook a key source of the problem: the rapid decline of fish and fauna.

The rules are mostly voluntary, which disappoints environmental groups, but they should ratchet down the amount of leaked methane from new or modified oil and gas operations, which contributes to climate change.

A new report from two environmental groups reviewed the recyclability and compostability of packaging from 47 food companies. It found few examples of companies that have prioritized waste reduction.

Al-Jazeera journalist Peter Greste will be deported to Australia. He is one of three Al-Jazeera journalists who were arrested in December 2013. NPR's Rachel Martin talks to Leila Fadel in Cairo.

It has been a month since an attack in a school in Peshawar killed at least 150 people, mostly school children. On Friday, the country remembered the victims with vigils and demonstrations.

This week, the Army held a town hall meeting at Fort Campbell. The sprawling Army post straddles Kentucky and Tennessee and is a major economic driver for the region.