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79 articles from PhysOrg

New approach takes quantum key distribution further

In an important step toward practical implementation of secure quantum-based communication, researchers have demonstrated secure measurement-device-independent quantum key distribution (MDI-QKD) transmission over a record-breaking 170 kilometers.

Unlocking the cell enhances student learning of the genetic code

An open-source educational biotechnology called the "Genetic Code Kit" has been developed by California Polytechnic State University researchers to allow students to interact with the molecular process inside cells in new ways. Researchers show that adapting state-of-the-art biotechnology for the classroom could transform how biology and biochemistry are taught to high school and undergraduate...

We rely on science. Why is it letting us down when we need it most?

Science is suffering from a replication crisis. Too many landmark studies can't be repeated in independent labs, a process crucial to separating flukes and errors from solid results. The consequences are hard to overstate: Public policy, medical treatments and the way we see the world may have been built on the shakiest of foundations.

Creating meaningful change in cities takes decades, not years, and starts from the bottom

Newly published research in Science Advances by University of Chicago researcher Luis Bettencourt proposes a new perspective and models on several known paradoxes of cities. Namely, if cities are engines of economic growth, why do poverty and inequality persist? If cities thrive on faster activity and more diversity, why are so many things so hard to change? And if growth and innovation are so...

Lungfish fins reveal how limbs evolved

The evolution of limbs with functional digits from fish fins happened approximately 400 million years ago in the Devonian. This morphological transition allowed vertebrates to leave the water to conquer land and gave rise to all four-legged animals or tetrapods—the evolutionary lineage that includes all amphibians, reptiles, birds and mammals (including humans). Since the nineteenth century...

Bacteria can defuse dangerous chemical in Rassaic River

Bacteria that can help defuse highly toxic dioxin in sediments in the Passaic River—a Superfund hazardous waste site—could eventually aid cleanup efforts at other dioxin-contaminated sites around the world, according to Rutgers scientists.

Ultrafast electrons in magnetic oxides: A new direction for spintronics?

Special metal oxides could one day replace semiconductor materials that are commonly used today in processors. Now, for the first time, an international team of researchers from Martin Luther University Halle-Wittenberg (MLU), the University of Kaiserslautern and the University of Fribourg in Switzerland was able to observe how electronic charge excitation changes electron spin in metal oxides in...

Dyes from atmospheric carbon dioxide

Dry soils in Germany, heat records in the Arctic and thawing permafrost soils in Siberia. The consequences of climate change are visible across the globe. To reduce the concentration of carbon dioxide (CO2) in the atmosphere, numerous research groups are investigating how CO2 can be used as a raw material for the production of chemicals.

Researchers discover new information on the regulation of cancer cell motility

PIM kinases are enzymes that promote metastatic growth and spread of cancer cells. Researchers from the University of Turku, Finland, have obtained new information on how PIM kinases enhance cancer cell motility by regulating the formation of actin fibers in the cytoskeleton. The published results support the development of PIM-targeted therapies to prevent metastasis formation in cancer patients.

The most sensitive instrument in the search for life in space

Researchers at the University of Bern have developed the highly sensitive ORIGIN instrument, which can provide proof of the smallest amounts of traces of life, for future space missions. Space agencies such as NASA have already expressed interest in testing ORIGIN for future missions. The instrument may be used on missions to the ice moons of Europa (Jupiter) and Enceladus (Saturn), for example.