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2 articles from EurekAlert
Stress-free path to stress-free metallic films paves the way for next-gen circuitry
Researchers from Tokyo Metropolitan University have used high power impulse magnetron scattering (HiPIMS) to create thin films of tungsten with unprecedentedly low levels of film stress. By optimizing the timing of a 'substrate bias pulse' with microsecond precision, they minimized impurities and defects to form crystalline films with stresses as low as 0.03 GPa, similar to those achieved through...
The City of David and the sharks' teeth mystery
Scientists have found an unexplained cache of fossilised shark teeth in an area where there should be none - in a 2900 year old site in the City of David in Jerusalem. This is at least 80 km from where these fossils would be expected to be found. There is no conclusive proof of why the cache was assembled, but it may be that the 80 million-year-old teeth were part of a collection, dating from just...