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137,292 articles from ScienceDaily

Apollo rock samples capture key moments in the Moon's early history

Volcanic rock samples collected during NASA's Apollo missions bear the isotopic signature of key events in the early evolution of the Moon, a new analysis found. Those events include the formation of the Moon's iron core, as well as the crystallization of the lunar magma ocean -- the sea of molten rock thought to have covered the Moon for around 100 million years after the it formed.

What to do when a mammogram shows swollen lymph nodes in women just vaccinated for COVID

When women undergo breast imaging shortly after receiving a COVID-19 vaccine in the arm, their tests may show swollen lymph nodes in the armpit area. Radiologists say that this is usually a normal finding, and if there are no other concerns, no additional imaging tests are needed unless the lymph nodes remain swollen for more than six weeks after vaccination. The team has published an approach to...

Parker Solar Probe offers stunning view of Venus

NASA's Parker Solar Probe captured stunning views of Venus during its close flyby of the planet in July 2020. For more insight, the WISPR team planned a set of similar observations of the Venusian nightside during Parker Solar Probe's latest Venus flyby on Feb. 20, 2021. Mission team scientists expect to receive and process that data for analysis by the end of April.

Ancient skeletal hand could reveal evolutionary secrets

Evolutionary expert Charles Darwin and others recognized a close evolutionary relationship between humans, chimps and gorillas based on their shared anatomies, raising some big questions: how are humans related to other primates, and exactly how did early humans move around?


Pushing computing to the edge by rethinking microchips' design

Responding to artificial intelligence's exploding demands on computer networks, researchers in recent years have radically increased the speed and slashed the energy use of specialized AI systems. Now, the researchers have moved their innovation closer to widespread use by creating co-designed hardware and software that will allow designers to blend these new types of systems into their...

Southern California COVID-19 strain rapidly expands global reach

A new strain of the coronavirus in Southern California is rapidly spreading across the country and around the world as travelers apparently carry the virus with them to a growing list of global destinations, according to new research. The strain now accounts for nearly half of current COVID-19 cases in Southern California.

Sulfur metabolism may have paved the way for evolution of multicellularity

When the slime mold Dictyostelium discoideum runs out of food, sulfur limitation drives its development from a unicellular to a multicellular organism. Researchers now present the nutrient signaling pathways in this early eukaryote in great detail. Their results show how metabolism may have played a crucial role in the origins of multicellularity. Moreover, the findings also have therapeutic...

Scientists capture the choreography of a developing brain

The formation of a brain is one of nature's most staggeringly complex accomplishments. The intricate intermingling of neurons and a labyrinth of connections also make it a particularly difficult feat for scientists to study. Now researchers have devised a strategy that allows them to see this previously impenetrable process unfold in a living animal -- the worm Caenorhabditis elegans.

Mechanism by which exercise strengthens bones and immunity

Scientists have identified the specialized environment, known as a niche, in the bone marrow where new bone and immune cells are produced. The study also shows that movement-induced stimulation is required for the maintenance of this niche, as well as the bone and immune-forming cells that it contains. Together, these findings identify a new way that exercise strengthens bones and immune function....

How to neutralize the SARS-CoV-2 virus

In the absence of effective treatments for COVID-19, many countries have approved the therapeutic use of blood plasma from recovering patients because it contains antibodies against the coronavirus. But not every type of antibody can neutralize the virus and render it noninfectious. New research explores variation in virus neutralization capabilities, which can vary widely by type of antibody.

Twin atoms: A source for entangled particles

One of the most important phenomena in quantum physics is entanglement - used for quantum krypography, quantum computers and many other applications. While it is easy to create pairs of entangled photons, it is much harder to create entangled atoms in a well-defined way. This has now been made possible using an experimental setup.