143 articles from WEDNESDAY 4.1.2023

It just got harder to question the existence of black holes

No notion in physics may be more mind bending than a black hole, an infinitesimal pit in spacetime whose gravity is so strong that nothing can escape. But could very dense, dark objects be masquerading as black holes? A new study suggests not. Simulations show how any material object dense enough to resemble a black hole would be unstable, either puffing up into something less dense or...

'Veggie' dinosaurs differed in how they ate their food

Although most early dinosaurs were vegetarian, there were surprising differences in the way that these animals tackled eating a plant-based diet, according to a new study by scientists from the Natural History Museum and the Universities of Bristol and Birmingham.

Eye-tracking marketing research boosts public transportation agency's ridership

One of Florida's largest passenger rail services is experiencing an increase in ridership—and leaders of a Florida Department of Transportation program that promotes alternatives to commuters who drive alone attribute some of this success to guidance from an interdisciplinary team of researchers at USF who combined eye-tracking technology and social marketing to improve the impact of marketing...

Climate change could cause 'disaster' in the world's oceans, say scientists

Climate-driven heating of seawater is causing a slowdown of deep circulation patterns in the Atlantic and Southern oceans, according to Earth system scientists at the University of California, Irvine, and if this process continues, the ocean's ability to remove carbon dioxide from the atmosphere will be severely limited, further exacerbating global warming.

Study shows hydroponic systems as a promising method for sustainable saffron production

Saffron (Crocus sativus) is a geophyte perennial plant from the family Iridaceae with underground soft corms. The stigmas of the saffron flower have been cultivated as a spice for at least 3,500 years. Conventional cultivation processes, such as planting, flower harvesting, and separation of the stigmas, are labor-intensive and time-consuming. The labor costs and low supply contribute to the high...

Researchers detect fluoride in water with new simple color change test

Environmental contaminants like fluoride, lead and pesticides exist all around and even within us. While researchers have simple ways to measure concentrations of such contaminants inside lab environments, levels are much more difficult to test in the field. That's because they require costly specialized equipment.

Climate change could cause 'disaster' in the world's oceans

Climate change will slow down deep overturning ocean circulation in the coming centuries. Using three dozen Earth system models, researchers have concluded that the Southern Meridional Overturning Circulation could completely shut down by 2300, causing disaster to the marine ecosystem on a large portion of the planet.

New type of entanglement lets scientists 'see' inside nuclei

Nuclear physicists have found a new way to use the Relativistic Heavy Ion Collider (RHIC) to see the shape and details inside atomic nuclei. The method relies on particles of light that surround gold ions as they speed around the collider and a new type of quantum entanglement that's never been seen before.

Climate risk insurance can effectively mitigate economic losses

Global warming is expected to lead to an accumulation of particularly intense hurricanes in the United States. This may substantially increase the economic losses caused by these storms. Better insurance could effectively mitigate the climate change-induced increase in economic losses. This is shown in a new study examining the effectiveness of climate risk insurance in the US.

What's Up: January 2023 Skywatching Tips from NASA

What are some skywatching highlights in January 2023? Some lovely groupings this month include the Moon with Mars, and later with Jupiter, and a close conjunction of Venus and Saturn. The brilliant stars of the Northern Hemisphere's winter sky are a dazzling sight all month long. And a comet discovered last March makes its closest approach to Earth in January, gracing pre-dawn skies....