142 articles from FRIDAY 9.2.2024

Immune genes are altered in Alzheimer's patients' blood

A new study has found the immune system in the blood of Alzheimer's patients is epigenetically altered. That means the patients' behavior or environment has caused changes that affect the way their genes work. Many of these altered immune genes are the same ones that increase an individual's risk for Alzheimer's. Scientists now theorize the cause could be a previous viral infection, environmental...

Surprisingly vibrant color of 12-million-year-old snail shells

Snail shells are often colorful and strikingly patterned. This is due to pigments that are produced in special cells of the snail and stored in the shell in varying concentrations. Fossil shells, on the other hand, are usually pale and inconspicuous because the pigments are very sensitive and have already decomposed. Residues of ancient color patterns are therefore very rare. This makes a new...

How electron spectroscopy measures exciton 'holes'

Semiconductors are ubiquitous in modern technology, working to either enable or prevent the flow of electricity. In order to understand the potential of two-dimensional semiconductors for future computer and photovoltaic technologies, researchers investigated the bond that builds between the electrons and holes contained in these materials. By using a special method to break up the bond between...

The 'snowball' fight over global deep freeze periods

A research team has picked a side in the 'Snowball Earth' debate over the possible cause of planet-wide deep freeze events that occurred in the distant past. According to a new study, these so-called 'Snowball' Earth periods, in which the planet's surface was covered in ice for thousands or even millions of years, could have been triggered abruptly by large asteroids that slammed into the Earth.

Asteroid 2024 BX1 left a rare type of meteorite

The asteroid 2024 BX1’s trip toward Earth ended in a fireball Jan. 21, 2024. Soon after, experts rushed to locate pieces of the resulting meteorite. The fragments — about the size of a walnut — were gathered by a team that included members from the Museum für Naturkunde Berlin, the SETI Institute, and others. FollowingContinue reading "Asteroid 2024 BX1 left a rare type of meteorite" The...

3D printer creates brain tissue that acts like the real thing

By squirting cells from a 3D printer, researchers have created tissue that looks—and acts—like a chunk of brain. In recent years, scientists have learned how to load up 3D printers with cells and other scaffolding ingredients to create living tissues, but making realistic brainlike constructs has been a challenge. Now, one team has shown that, by modifying its printing techniques, it...

This is a possible solution to what can cause a ‘snowball Earth’

Scientists think Earth may have undergone at least two extreme freeze events throughout its history, becoming a so-called “snowball Earth” with a surface covered by ice. What triggered these events is not fully understood, but new research published Feb. 9 in Science Advances suggests a substantial asteroid impact in an already-cold climate (such as that duringContinue reading "This is a...

A new study makes the case for asteroid strikes setting in motion global glaciation in the distant past

A research team has picked a side in the "Snowball Earth" debate over the possible cause of planet-wide deep freeze events that occurred in the distant past. According to their new study, these so-called "Snowball" Earth periods, in which the planet's surface was covered in ice for thousands or even millions of years, could have been triggered abruptly by large asteroids that slammed into the...

Surprising behavior in one of the least studied mammals in the world

Some animals live in such remote and inaccessible regions of the globe that it is nearly impossible to study them in their natural habitats. Beaked whales, of which 24 species have been found so far, are among them: They live far from land and in deep oceanic waters, where they search for food at depths of 500 meters and more.

Research reveals the key to an irresistible online dating profile

In writing a good online dating profile, the average love-seeker will likely fill it up with all the appealing qualities and interests that make them special. They paraglide and do hot yoga on the weekends, enjoy Riesling on the beach or seeing indie bands in basements, are a Libra with Scorpio rising, or have a dog or three kids or an iguana. There's one thing they routinely leave out, however:...

New AI tool discovers realistic 'metamaterials' with unusual properties

A coating that can hide objects in plain sight, or an implant that behaves exactly like bone tissue—these extraordinary objects are already made from "metamaterials." Researchers from TU Delft have now developed an AI tool that not only can discover such extraordinary materials but also makes them fabrication-ready and durable. This makes it possible to create devices with unprecedented...