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Around the world, hip-hop gives a voice to the voiceless. Our photo essay spotlights rappers in Senegal, who shout out their frustrations about living in poverty and their dreams of a better future.

A startup in India — where an aging, ad hoc system limits water availability — is using text messages to let people know when their faucets should work, so they don't waste hours awaiting the deluge.

Airs Saturdays, Oct. 24 - Nov. 21, 2015 & Dec. 19, 2015 - Jan. 16, 2016 at 1 p.m. on KPBS TV

What seemed like a case of food poisoning has now turned into a police investigation. Synthetic drugs present an evolving problem for the Drug Enforcement Administration.

Airs Sundays, Jan. 17-31, 2016 at 11 p.m. on KPBS TV

The court decision means companies are on the hook for helping at least some consumers in California safely dispose of leftover pills and other medicine. Similar measures are in the works elsewhere.

By granting scientists access to your idle computer or Android device, you can help The Scripps Research Institute build a virtual supercomputer dedicated to identifying drug compounds to treat Ebola.

The Turnaround Arts Initiative is using an ambitious arts curriculum to try and turn eight low-performing schools around. Celebrities like Kerry Washington and Yo-Yo Ma have signed on to help encourage kids, but the program's success will ultimately be measured in test scores.

Airs Friday, March 27, 2015 at 9 p.m. on KPBS TV

Intra-party turmoil could spill over into the next election, with labor groups threatening primaries against members — even those who sit in swing districts — who sided with the president.