Dashing the dream of ideal 'invisibility' cloaks for stress waves

Whether Harry Potter's invisibility cloak, which perfectly steers light waves around objects to make them invisible, will ever become reality remains to be seen, but perfecting a more crucial cloak is impossible, a new study ...

How much would you pay to eliminate child labor from your cocoa?

An increase in cocoa price by 2.8 percent could potentially eliminate the very worst forms of child labor from cocoa production in Ghana, according to a new economic model described in a study published June 5, 2019 in the ...

NIST infrared frequency comb measures biological signatures

Researchers at the National Institute of Standards and Technology (NIST) and collaborators have demonstrated a compact frequency-comb apparatus that rapidly measures the entire infrared band of light to detect biological, ...

Image: Mature galaxy mesmerizes in new Hubble view

This striking image was taken by the NASA/ESA Hubble Space Telescope's Wide Field Camera 3 (WFC3), a powerful instrument installed on the telescope in 2009. WFC3 is responsible for many of Hubble's most breathtaking and iconic ...

Four new species of plume moths discovered in Bahamas

Deborah Matthews hunts for plume moths in darkness, waiting for the halo of her headlamp to catch a brief flicker. About the size of mosquitoes, the delicate, feathery moths fly only a few feet at a time. Matthews must watch ...

New core-shell catalyst for ethanol fuel cells

Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory and the University of Arkansas have developed a highly efficient catalyst for extracting electrical energy from ethanol, an easy-to-store ...

Older forests resist change—climate change, that is

Older forests in eastern North America are less vulnerable to climate change than younger forests—particularly for carbon storage, timber production, and biodiversity—new University of Vermont research finds.

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