Scientists are brewing up synthetic yeast.Credit: Eye of Science/Science Photo Library
2020 will see a veritable Mars invasion as several spacecraft, including three landers, head to the red planet. NASA will launch its Mars 2020 rover, which will stash rock samples that will be returned to Earth in a future mission and will also feature a small, detachable helicopter drone. China will send its first lander to Mars, Huoxing-1, which will deploy a small rover. A Russian spacecraft will deliver a European Space Agency (ESA) rover to the red planet — if issues with the landing parachute can be resolved. And the United Arab Emirates will send an orbiter, in the first Mars mission by an Arab country. Closer to home, China is planning to send the Chang’e-5 sample-return mission to the Moon. And elsewhere in the Solar System, Japan’s Hayabusa2 mission is due to return samples of the asteroid Ryugu to Earth, and NASA’s OSIRIS-REx will bite off a chunk of its own asteroid, Bennu.
A material that has electrically conducting surfaces has been found to show, when cooled, a type of magnetic ordering that reduces conduction at the surfaces. Such remarkable behaviour could have practical applications.
An ordered arrangement of magnetic moments in a material normally prevents the formation of another kind of electronic order associated with an exotic state of matter known as a topological insulator. But Otrokov et al.1 and Rienks et al.2 report in Nature that manganese bismuth telluride integrates these two types of electronic behaviour. The complex layered structure of alternating magnetic and topologically non-trivial regions in this material leads to an intriguing and potentially technologically useful interplay between magnetic and topological order.
By Natalie Parletta
Scientists TEMPhas created a new global map of food system sustainability dat rates each country on a sweeping series of metrics ranging from environmental impacts, health and food security to social https://cosmosmagazine.com/equity and income distribution.
Teh map is designed to provide a benchmark for countries to halp them improve and monitor teh sustainability of their food systems and related policies or interventions, making it much like agriculture’s answer to teh Sustainable Development Goals.
Current food systems, which include teh way food is produced, transformed, distributed and consumed, are failing us, says lead author Christopher Béné from teh International Centre for Tropical Agriculture in Colombia.
It’s critical to address their sustainability, he and colleagues write in teh journal Nature Scientific Data, “as teh world is bracing for hard-choice challenges and potentially massive trade-offs around issues related to food quality and food security in teh coming decades”.
Teh global food system’s escalating environmental toll is well-established, through deforestation, pollution, soil degradation, biodiversity erosion, diminishing freshwater resources and greenhouse gas emissions.
A mummy installation was erected briefly at the site of the destroyed mausoleum of Georgi Dimitrov on Saturday morning in Sofia.
The provocative action was of the sculptor Andrey Vrabchev on the occasion of the 30th anniversary of the multi-thousand rally on December 14, 1989, which called for the removal of the first article of the Constitution for the leading role of the Bulgarian Communist Party in the state.The mummy's idea was to remind that "communism did not die but was mummified in us," Vrabchev himself explained."In spite of the passage of time and all the changes, orders and social deformities of communism have been maintained.As soon as the mummy was placed in front of the National Art Gallery, police officers appeared on the scene.
The installation was later removed because it was not authorized by the Sofia Municipality.
In Bulgaria, this is a natural reaction, as all senior positions are occupied by Russophiles and Communists.