288 articles from TUESDAY 18.5.2021

Saving the eastern monarch butterfly

Simon Fraser University researchers are playing a key role in guiding conservation efforts to protect a declining butterfly population. The eastern monarch butterfly, an important pollinating species known for its distinct yellow-orange and black colour, is diminishing due to the loss of the milkweed plant—its primary food source.

Study finds topography is key factor in where Andean bear mothers make their dens

Compared to most other bear species, very little is known about how female Andean bears choose where they give birth to cubs. As a critical component of the reproductive cycle, birthing dens are essential to the survival of South America's only bear species, listed as Vulnerable on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species.

Bipolar order: A straightforward technique to have more control over organic thin films

Modern and emerging applications in various fields have found creative uses for organic thin films (TFs); some prominent examples include sensors, photovoltaic systems, transistors, and optoelectronics. However, the methods currently available for producing TFs, such as chemical vapor deposition, are expensive and time-consuming, and often require highly controlled conditions. As one would expect,...

NASA’s S-MODE Takes to the Air and Sea to Study Ocean Eddies

Portal origin URL: NASA’s S-MODE Takes to the Air and Sea to Study Ocean EddiesPortal origin nid: 471065Published: Tuesday, May 18, 2021 - 15:30Featured (stick to top of list): noPortal text teaser: After being delayed over a year due to the pandemic, a NASA field campaign to study the role of small-scale whirlpools and ocean currents in climate change is taking flight...

Stolen Roman frescoes returned to Pompeii after investigation

Six fragments returned to archaeological park, some after being illegally trafficked in 1970sSix fragments of wall frescoes stolen from the ruins of ancient Roman villas have been returned to Pompeii’s archaeological park, after an investigation by Italy’s cultural protection police squad.Three of the relics, which date back to the first century AD, are believed to have been cut off the walls...

Any amount of alcohol consumption harmful to the brain, finds study

UK study of 25,000 people finds even moderate drinking is linked to lower grey matter densityThere is no safe amount of alcohol consumption for the brain, with even “moderate” drinking adversely affecting nearly every part of it, a study of more than 25,000 people in the UK has found.The study, which is still to be peer-reviewed, suggests that the more alcohol consumed, the lower the brain...

Evolving to a more equitable AI

The pandemic that has raged across the globe over the past year has shone a cold, hard light on many things—the varied levels of preparedness to respond; collective attitudes toward health, technology, and science; and vast financial and social inequities. As the world continues to navigate the covid-19 health crisis, and some places even begin a gradual return to work, school, travel, and...

Turn problems into opportunities: Photorespiration for improved plant metabolism

In today's plants, photorespiration dissipates some of the energy produced by photosynthesis and releases CO2. It begins when the enzyme RuBisCO acts on oxygen instead of carbon dioxide and creates toxic side-products requiring costly recycling reactions. The detoxification process uses up fixed carbon and wastes energy, thus strongly limiting agricultural productivity.

White roofs and more green areas would mitigate the effects of heat waves in cities

The frequency and intensity of heat waves in cities is increasing due to climate change, with a great negative impact on the health and mortality rates of the population. Anthropogenic activities and urban materials affect heat accumulation in cities, and solar radiation stored throughout the day on asphalt and buildings is released slowly during the night, generating significant heat stress. To...