Retired California school teacher Mikkel Lawrence sits with his cat, Max. Lawrence has hepatitis C and has struggled to afford the medicine he needs to treat it. April Dembosky/KQED hide caption

itoggle caption April Dembosky/KQED

A bird covered in oil flaps its wings at Refugio State Beach, north of Goleta, Calif., on Thursday. More than 9,000 gallons of oil have been raked, skimmed and vacuumed from a spill that stretched across 9 miles of California coast, just a fraction of the sticky, stinking goo that escaped from a broken pipeline, officials said. Jae C. Hong/AP hide caption

itoggle caption Jae C. Hong/AP

"We can harness our bodies' own abilities that are kind of kept under wraps to allow the aging process to be slowed down." - Biochemist Cynthia Kenyon James Duncan Davidson/Courtesy of TED hide caption

itoggle caption James Duncan Davidson/Courtesy of TED

Medical ethicist Harvey Fineberg says "neo-evolution" is on the horizon. James Duncan Davidson/Courtesy of TED hide caption

itoggle caption James Duncan Davidson/Courtesy of TED

Plankton collected in the Pacific Ocean with a 0.1mm mesh net. Seen here is a mix of multicellular organisms — small zooplanktonic animals, larvae and single protists (diatoms, dinoflagellates, radiolarians) — the nearly invisible universe at the bottom of the marine food chain. Christian Sardet/CNRS/Tara Expeditions hide caption

itoggle caption Christian Sardet/CNRS/Tara Expeditions

This fungus among us — baker's yeast, aka Saccharomyces cerevisiae — is useful for more than just making bread. iStockphoto hide caption

itoggle caption iStockphoto

A morning's berry harvest from West Philadelphia's Ogden Orchard includes raspberries, gooseberries, currants, goumis and mulberries. Courtesy of Philadelphia Orchard Project hide caption

itoggle caption Courtesy of Philadelphia Orchard Project

Men in hazardous materials suits load dead poultry to be buried at Rose Acre Farms Inc., just west of Winterset, Iowa, on May 11. John Gaps III/AP hide caption

itoggle caption John Gaps III/AP

An ancient stone tool unearthed at the excavation site near Kenya's Lake Turkana. It's not just the shape and sharp edges that suggest it was deliberately crafted, the researchers say, but also the dozens of stone flakes next to it that were part of the same kit. MPK-WTAP hide caption

itoggle caption MPK-WTAP

Sales of prescription opioid painkillers have quadrupled since 1999, according to the Centers for Disease Control and Prevention. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

The White House announced an action plan Tuesday aimed at reversing dramatic declines in pollinators like honeybees, which play a vital role in agriculture, pollinating everything from apples and almonds to squash. Joe Raedle/Getty Images hide caption

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Jenny Tenorio Gallegos, 35, in Lima, Peru, is being treated for drug-resistant TB. The treatment lasts two years and may rob her of her hearing. Jason Beaubien/NPR hide caption

itoggle caption Jason Beaubien/NPR

The most recent common ancestor of all today's snakes likely lived 120 million years ago. Scientists believe it used needle-like hooked teeth to grab rodent-like creatures that it then swallowed whole. Julius Csotonyi/BMC Evolutionary Biology hide caption

itoggle caption Julius Csotonyi/BMC Evolutionary Biology