Hubble Illuminates Cluster of Diverse Galaxies

This image from NASA's Hubble Space Telescope shows the diverse collection of galaxies in the cluster Abell S0740 that is over 450 million light-years away in the direction of the constellation Centaurus.

Discovery of a new type of very-high-energy gamma ray emitter

An international team of astrophysicists from the H.E.S.S. collaboration has announced the discovery of a new type of very-high-energy (VHE) gamma ray source. Combining data obtained during a systematic survey of the Galactic ...

Environmental toxicants like lead, mercury target stem cells

Low levels of toxic substances cause critical stem cells in the central nervous system to prematurely shut down. That is the conclusion of a study published today in the on-line journal PLoS Biology. This research, which ...

Bioengineering efficient antibiotic biosynthesis in E. coli

The pathways underlying the production of antibiotics are now quite well known. For example, the antibacterial activity of erythromycin, an important polyketide antibiotic precursor, requires the transfer of two unusual sugars ...

Universe contains more calcium than expected

The universe contains one and a half times more calcium than previously assumed. This conclusion was drawn by astronomers of the SRON Netherlands Institute for Space Research, after observations with ESA's XMM-Newton X-ray ...

Nanotechnology key to China's future economic success

"China is betting that their growing investment in nanoscience will help them capture a large share of what shortly will become a $3 trillion global market in nanotech manufactured goods, and that breakthroughs in nanotechnology ...

Human proteins evolving slowly thanks to multitasking genes

Many human proteins are not as good as they might be because the gene sequences that code for them have a double role which slows down the rate at which they evolve, according to new research published in PLoS Biology.

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