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Science News for August 19, 2012


Middle-class children: Squeaky wheels in training

A study by Indiana University sociologist Jessica McCrory Calarco found that middle-class parents encourage their children to ask questions and seek help, while working-class parents coach them to avoid problems. This difference in parenting approaches can impact children's ability to interact with institutions later in life.

Massachusetts butterflies move north as climate warms

A study by Harvard University researchers found that Massachusetts butterfly populations are moving north as the climate warms, with subtropical species such as the giant swallowtail and zabulon skipper increasing in abundance. In contrast, more than three quarters of northerly species are declining, particularly those that overwinter ...

SourceHarvard University·JournalNature Climate Change·DateAug 19, 2012

The wasp that never cries wolf

Researchers found a direct relationship between the brightness of European paper wasps' colours and the size of their poison glands. This colouration serves as an honest signal to predators that the wasp is strong and healthy, potentially wasting energy on bright patterns.

SourceBMC (BioMed Central)·JournalFrontiers in Zoology·DateAug 19, 2012

A new route to dissipationless electronics

Researchers at RIKEN have demonstrated a new material that can eliminate loss in electrical power transmission, opening the door to energy-efficient electronics. The discovery uses magnetic topological insulators, which exhibit unique properties that allow for dissipationless electricity channels.

SourceRIKEN·JournalNature Physics·DateAug 19, 2012