North Korea's latest nuclear weapons test is much more powerful than the previous two, according to estimates made by instruments that measure seismic waves from the blast. But it's hard to verify North Korea's claim that the test was of a miniaturized nuclear weapon.
A new smartphone app allows users to document falling precipitation in their location. The mPING app aims to help weather officials program radar to determine exactly what's falling near you. For example, is it hail or mixed rain?
Consumers are increasingly being marketed seafood with labels that are supposed to certify that it's good for the environment. We asked about consumers' seafood eating habits and whether they prefer to buy "sustainably caught" fish.
Environmentalists, together with the Marine Stewardship Council, say that Day Boat's story reflects the good that the MSC system can do. But critics say the vigorous certification process is inconsistent.
Most fisheries certified by the MSC system have conditions that spell out how they have to change their operations to comply with MSC standards. But they can still be labeled "certified sustainable seafood" even though they have years to comply.
Manure from pig farms doesn't just contain residues of antibiotics used in livestock. It also carries high concentrations of antibiotic-resistant bacteria, a new study of Chinese pig farms finds. And researchers say "it's a global problem."
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