Earth

Our search for sustainable energy generation technology has led researchers to investigate various materials and their combinations in many types of devices. One such synthetic material is called "perovskite", which is low-cost and easy to produce, and can be used in solar cells. Perovskite solar cells have attracted much attention because their power conversion efficiency (that is, their efficiency at turning sunlight into electricity) has seen dramatic improvements in recent years.

NASA-NOAA's Suomi NPP satellite provided infrared data that showed the development of Tropical Storm Octave in the Eastern Pacific Ocean.

Octave formed on Oct. 17 by 5 p.m. EDT as a tropical depression. At that time, it was located about 1,410 miles (2,265 km) southwest of the southern tip of Baja California, Mexico.

NASA-NOAA's Suomi NPP satellite provided forecasters at the Joint Typhoon Warning Center with a visible image of Tropical Storm Neoguri that showed it had become more organized over the previous 24 hours.

Tropical Depression 21W lacked organization for a couple of days until early on Oct. 18 when the Suomi NPP satellite passed overhead and showed it had consolidated. The storm had strengthened from a depression to a tropical storm on Oct. 18.

NASA-NOAA's Suomi NPP satellite provided night-time and infrared views of developing Tropical Storm Nestor in the Gulf of Mexico and found over-shooting cloud tops and gravity waves. When the satellite passed over the potential tropical depression early on Oct. 18, it was consolidating. Less than 12 hours later, it became a tropical storm.

The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP provided a night-time and an infrared image of the storm.

Night-time Imagery of Nestor: Overshooting Tops, Gravity Waves

URBANA, Ill. - Wind energy is increasingly seen as a sustainable alternative to fossil fuels, as it contributes to a reduction in greenhouse gas emissions. It is estimated that by 2050, wind turbines will contribute more than 20% of the global electricity supply. However, the rapid expansion of wind farms has raised concerns about the impact of wind turbines on wildlife.

Research in that area has been limited and has yielded conflicting results. A new study, published in Energy Science, provides comprehensive data on how turbines affect bird populations.

Evening gowns with interwoven LEDs may look extravagant, but the light sources need a constant power supply from devices that are as well wearable, durable, and lightweight. Chinese scientists have manufactured fibrous electrodes for wearable devices that are flexible and excel by their high energy density. A microfluidic technology was key for the preparation of the electrode material was a microfluidic technology, as shown in the journal Angewandte Chemie.

The synthesis and isolation of a nitrogen-embedded polycyclic compound with strong antiaromaticity and stability was achieved for the first time by a research group at Ehime University. This result was published on October 2, 2019 in the Journal of the American Chemical Society.

An international team of scientists, led by the Helmholtz Zentrum Dresden-Rossendorf (HZDR), have found a new compound of plutonium with an unexpected, pentavalent oxidation state, using the ESRF, the European Synchrotron, Grenoble, France. This new phase of plutonium is solid and stable, and may be a transient phase in radioactive waste repositories. The results are published this week in Angewandte Chemie as a Very Important Paper (VIP).

A research group at Chalmers University of Technology, Sweden, has developed an efficient process for breaking down any plastic waste to a molecular level. The resulting gases can then be transformed back into new plastics - of the same quality as the original. The new process could transform today's plastic factories into recycling refineries, within the framework of their existing infrastructure.

MADISON, Wis. -- Researchers have discovered a previously unknown virus infecting nearly a third of America's bald eagle population.

When students at the University of California, Santa Cruz (UCSC) found a dead mule deer on campus, they figured it had been killed by coyotes. Wildlife biologist Chris Wilmers rigged up a video camera to spy on the carcass at night. But the animal that crept out of the shadows to dine on the deer was no coyote - it was a mountain lion.

Determining the optimal binding energies for heterogeneous chemical reactions--usually meaning that the reactant is in the gas or liquid phase while the catalyst is a solid--is critical for many aspects of modern society, as we rely on such reactions for processes as diverse as the production of fertilizers and plastics.

Biodiversity is changing rapidly in many places all over the world. However, while the identities of species in local assemblages are undergoing significant changes, the number of species is on average remaining relatively constant. Thus, changes in local assemblages do not always reflect the species losses occurring at the global scale. These findings are based on observations by a team of scientists led by the German Centre for Integrative Biodiversity Research (iDiv), the Martin Luther University Halle-Wittenberg (MLU) and the University of St Andrews.

Local biodiversity of species - the scale on which humans feel contributions from biodiversity - is being rapidly reorganized, according to a new global analysis of biodiversity data from more than 200 studies, together representing all major biomes. The findings are important as historically, "it has been surprisingly difficult and controversial to find signals of ... global trends in biodiversity in the context of local ecosystems," write Brita Eriksson and Helmut Hillebrand in a related Perspective.

Modern Melanesians harbor beneficial genetic variants that they inherited from archaic Neanderthal and Denisovan hominins, according to a new study. These genes are not found in many other human populations, the study adds. The results suggest that large structural variants introgressed from our archaic ancestors may have played an important role in the adaptation of early modern human populations and that they may represent an under-appreciated source of the genetic variation that remains to be characterized in our modern genomes.