Dr. Lisa Sterman holds Truvada pills at her office in San Francisco. The drug was recently approved by the Food and Drug Administration to prevent infection in people at high risk of infection with HIV. The pill, already used to treat people with HIV, also helps reduce the odds they will spread the virus.
The Harvard researcher probably speaks for many of the 23,000 scientists, activists and policy mavens who came to the Washington conference. But they're going home with a big question on their minds: Can the world afford it?
Bioengineers are developing microchips, about the size of a thumb, that can behave like human organs. Donald Ingber, director of the Wyss Institute for Biologically Inspired Engineering, discusses how the "organ-on-a-chip" works and why the technology could replace the animal model for drug testing.
A flurry of extreme weather events, including wildfires, heat waves and droughts may have convinced more Americans that the planet is warming. A poll by the Brookings Institute found that 62 percent of Americans now believe in global warming, and nearly half of them have cited warmer temperatures or change in weather patterns as the reason for their belief.