Earth

Sperm are generally viewed as having just one action in reproduction - to fertilise the female's egg - but studies at the University of Adelaide are overturning that view.

Published in Nature Research journal Communications Biology, new research shows that sperm also deliver signals directly to the female reproductive tissues to increase the chances of conception.

Marilyn Monroe famously sang that diamonds are a girl's best friend, but they are also very popular with quantum scientists - with two new research breakthroughs poised to accelerate the development of synthetic diamond-based quantum technology, improve scalability, and dramatically reduce manufacturing costs.

While silicon is traditionally used for computer and mobile phone hardware, diamond has unique properties that make it particularly useful as a base for emerging quantum technologies such as quantum supercomputers, secure communications and sensors.

What The Study Did: Hospital discharge rates, hospitalization outcomes and demographic factors were examined among U.S. patients with ischemic stroke before and during the COVID-19 pandemic.

Authors: Adam de Havenon, M.D., of the University of Utah in Salt Lake City, is the corresponding author.

To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/

(doi:10.1001/jamanetworkopen.2021.10314)

Scientists have succeeded in dating some of the oldest stars in our galaxy with unprecedented precision by combining data from the stars' oscillations with information about their chemical composition.

The team led by researchers at the University of Birmingham, surveyed around a hundred red giant stars, and were able to determine that some of these were originally part of a satellite galaxy called Gaia-Enceladus, which collided with the Milky Way early in its history.

Researchers from Tohoku University have developed a new numerical method that paves the way for simulating landslide tsunamis.

Their research was published in the journal Computational Mechanics on May 13, 2021.

Landslides occurring on land or underneath the sea - known as subaerial and submarine landslides respectively - can cause devastating tsunamis. They also pose other hazards such as severing submarine cables and pipelines.

An international team of researchers from Japan, the US and the UK has analyzed the function of the histone demethylase KDM5A in multiple myeloma, one of the three major hematological cancers, and clarified the mechanism by which it promotes myeloma cell proliferation. They also developed a novel KDM5 inhibitor and showed that it inhibits cancer cell growth in a myeloma mouse model. The researchers expect that new therapies targeting KDM5A will be developed in the future.

Scientists from Hokkaido University have used species survey and climate data to identify two marine biodiversity refugia in the Eastern Bering Sea - regions where species richness, community stability and climate stability are high.

Researchers at the University of Adelaide have found several grape varieties native to Cyprus, which tolerate drought conditions better than some international varieties popular in Australia, contain chemical compounds responsible for flavours preferred by Australian consumers.

The study published in OENO One follows earlier research with Cypriot grape varieties Maratheftiko and Xynisteri in particular, which showed they are well adapted to a hot climate and continue to perform well as the climate becomes hotter.

ATLANTA - Yerkes National Primate Research Center researchers in collaboration with Institut Pasteur have determined a combination immunotherapy of Interleukin-21 (IL-21) and interferon alpha (IFN?) when added to antiviral therapy (ART) is effective in generating highly functional natural killer (NK) cells that can help control and reduce simian immunodeficiency virus (SIV) in animal models. This finding, published online today in Nature Communications, is key for developing additional treatment options to control HIV/AIDS, which impacts 38 million people worldwide.

Heavy precipitation can cause large economic, ecological, and human life losses. Both its frequency and intensity have increased due to climate change influences. Therefore, it is becoming increasingly critical to accurately model and predict heavy precipitation events. However, current global climate models (GCMs) struggle to correctly model tropical precipitation, particularly heavy rainfall. Atmospheric scientists are working to identify and minimize model biases that arise when attempting to model large-scale and convective precipitation.

A new study led by Dr. Wei and Dr. Qiao from the First Institute of Oceanography, Ministry of Natural Resources provides an evaluation of the performance of the newly released CMIP6 models in simulating the global warming slowdown observed in the early 2000s. This study reveals that the key in simulating and predicting near-term temperate change is to correctly separate and simulate the two distinct signals, i.e., the human-induced long-term warming trend and natural variabilities, especially those at interannual, interdecadal and multidecadal scales.

The collision between the Indian and Eurasian plates resulted in the formation of the Tianshan Tectonic Belt; however, the formation mechanism of Tianshan and the construction of a dynamic model explaining it remain to be achieved and an integrated understanding has not been reached. A new study adopted shear-wave splitting system to collect and analyze shear-wave splitting parameters of 33 stations in the Tianshan area, it provides new evidence for potentially enhance the understanding the dynamic mechanism of the Tianshan tectonic belt.

Researchers from the Francis Crick Institute, Royal Marsden, UCL and Cruces University Hospital have found that cells from different parts of kidney tumours behave differently, and surprisingly, cells within the centre of a tumour are the most aggressive and have the highest chance of spreading around the body.

Cancers can spread to other parts of the body, with cells taking hold as secondary tumours which make the disease much harder to treat. Understanding the mechanics of this spread, a process called metastasis, could lead to new treatments that block this migration.

A new study led by researchers from the Oxford University Museum of Natural History, University of Oxford and the University of Birmingham for Current Biology has used new methods to analyse the variability of mammal fossils, revealing extraordinary results: it was not dinosaurs, but possibly other mammals, that were the main competitors of modern mammals before and after the mass extinction of dinosaurs.

ANN ARBOR, Mich. -- For children, pandemic norms have meant virtual school, holidays over Zoom and for some, even seeing the doctor from their own homes.

One in five parents in a new national poll say their child had a virtual health visit over the past year for either check-ups, minor illnesses, mental health or a follow up - a marked increase in remote care for children.