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In this diagram, San Diego biotech company Synthorx explains how DNA with an expanded alphabet theoretically could produce entirely new proteins and — they hope — new drugs.

San Diego Scientists Made One of the Year's Biggest Breakthroughs

By expanding the genetic alphabet, San Diego researchers made one of the year's biggest breakthroughs, according to a leading journal.

NET Power has built carbon capture technology into its power plant outside Houston, which will generate electricity by burning natural gas. The demonstration project should be fully operational later this year, according to NET Power.

Natural Gas Plant Makes A Play For Coal's Market, Using 'Clean' Technology

The idea behind "clean coal" is technology that would capture for reuse most of the carbon dioxide emitted by coal-burning power plants. Entrepreneurs aim to use similar tech to clean natural gas.

An Indian worker sweeps a street in a cloud of choking smog in New Delhi on Monday, the day after fireworks for the Diwali festival. After millions of firecrackers were lit, New Delhi's air pollutants shot up far higher than normal levels.

PHOTOS: After Diwali Fireworks, Smog Shrouds New Delhi

New Delhi suffers from intense air pollution every winter. On Monday, the stifling smog was particularly acute — in part because of the countless firecrackers set off for Diwali this weekend.

Two photos show traffic moving past the landmark India Gate monument in New Delhi before and after the Diwali celebrations: on Friday (top) and Monday (bottom). As Indians wake Monday to smoke-filled skies from a weekend of festival fireworks for the Hindu holiday of Diwali, New Delhi's worst season for air pollution begins.

PHOTOS: After Diwali Fireworks, Smog Shrouds New Delhi

New Delhi suffers from intense air pollution every winter. On Monday, the stifling smog was particularly acute — in part because of the countless firecrackers set off for Diwali this weekend.

Life Sciences Has Major Impact On California's Economy

California is getting a huge economic bump from the state's life science industry. San Diego's biotechnology cluster plays a role in that success.

Specimens were flown in the Aero, a fixed-wing aircraft made by 3D Robotics of Berkeley, Calif.

Doctors Test Drones To Speed Up Delivery Of Lab Tests

Doctors, hospitals and entrepreneurs say drones could become a faster, cheaper way to deliver medical tests. But there are a lot of details to be worked out before your blood test hits the runway.

Lori Saldaña announces her candidacy for San Diego mayor, Jan. 28, 2015.

Three’s Company In San Diego Mayoral Race

San Diego Mayor Kevin Faulconer was widely thought to be coasting to re-election on June 7. But now with two high-profile challengers — former Assemblywoman Lori Saldaña and former City Councilman Ed Harris — Faulconer has been forced to defend his record in office.

Henry Louis Gates, Jr. explores the Dantokpa Market, one of the largest in the city of Cotonou, located in the west African nation of Benin.

AFRICA’S GREAT CIVILIZATIONS

Stream now with KPBS Passport

Zap! Magnet Study Offers Fresh Insights Into How Memory Works

A magnetic pulse to a certain spot in the brain of healthy volunteers restored recently "forgotten" thoughts, researchers found. The study is shifting the understanding of short-term recall.

A chile-rubbed pork taco is topped with french fries in the Merced market in Mexico City. The taco costs 10 pesos — less than 50 cents. Cheap, high-calorie food is contributing to Mexico's obesity problem.

Pork Tacos Topped With Fries: Fuel For Mexico's Diabetes Epidemic

Mexico knows how to fight infectious diseases. Tackling a chronic condition like diabetes is a new — and daunting — challenge.

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