Combining rice paddles and fish ponds, and using locally caught fish as feed, are just two of the ways that fish farming, or aquaculture, can be made more environmentally friendly.
The day after Syrian President Bashar al-Assad reportedly agreed to UN envoy Kofi Annan's cease-fire plan, fighting continued in several cities.
The Woolworth lunch counter where students protested against desegregation in 1960 recently became the International Civil Rights Center & Museum.
Support for South Sudan's White Army is complex. Some say backing comes from a diaspora of armed youth, local politicians eager to stoke violence, and militias, writes a guest blogger.
Many are watching to see if the pope mentions the case of imprisoned US aid worker Alan Gross. But the delicacy of his trip to Cuba makes it unlikely, writes guest blogger Girish Gupta.
Brazil's Pacifying Police Units will enter a Rio favela this month to step up security. But announcing the 'clearing' of a favela gives powerful drug traffickers time to flee before security forces arrive.
The alleged discovery of nearly a dozen suicide vests at the Afghan Ministry of Defense deepens concerns about the loyalty of Afghan security forces, which have already killed 16 coalition troops this year.