Police in Prince George's County, Md., "have arrested a man who [they say] referred to himself as 'a joker' and threatened to shoot people at his former workplace," The Washington Post's The Crime Scene blog writes.
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.