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Science News

Location American Science News for 9 Jan 2025

La Niña is finally hereAfter months of delay, the cool La Niña climate pattern has emerged in the eastern tropical Pacific Ocean, which increases the risk of drought in parts of the Americas
Push-and-Pull Signals DirectScientists have uncovered how developing neurons migrate from the germinal zone, a process critical for proper brain circuit formation. They identified a "push-pull" system where the guidance molecule... Netrin-1 repels differentiated neurons, while the ubiquitin ligase Siah2 prevents premature migration by degrading essential proteins.

Brain Cell Genetics Shape Aging and Alzheimer's Risk

Neuroscience News - 9 Jan 2025 23:34
Brain Cell Genetics ShapeResearchers have identified genetic variations in brain cells, particularly microglia and oligodendrocytes, that influence both aging and Alzheimer's risk. These variations impact how cells function... as they age, potentially priming some individuals for dementia.
9 weird, wonderful andFrom a Star Wars-style droid for your home to a Pixar-inspired lamp bot, these are the most interesting and innovative robots we've seen so far at CES.
Neural Mechanisms BehindMale and female mice usually prefer female companions but switch to preferring males under survival stress, a new study reveals. This behavioral shift is driven by distinct brain circuits involving... dopaminergic neurons in the ventral tegmental area.
Scientists discover new kindA new study describes a type of cartilage that may have been discovered, forgotten and found again at several points in history.
High-Fat Diets in AdolescenceAdolescent rats fed a high-fat diet displayed increased impulsivity and altered decision-making as adults. These "cheesecake rats" were quicker to act on visual cues (indicative of impulsivity) but... showed more conservative choices in gambling tasks, opting for smaller, safer rewards.
There's a speed limit to humanHuman brains take in sensory data at more than 1 billion bits per second, but only process that information at a measly 10 bits per second, new research has found.
Mars rock samples may containNASA will explore two different strategies for fetching Mars rocks collected by the Perseverance rover, and there's a chance these samples contain evidence of alien life.
Your ears and nose are madeIt turns out that the cartilage inside your ears and nose is different from that found elsewhere in the body, with a fatty structure that makes it look like bubble wrap, and this long-overlooked... tissue could prove useful in certain surgeries
'Red balloon' sprouts fromThe newborn had a birth defect that left a gap in his lower spine, through which tissue pushed out and formed a giant, red, balloon-like structure.
Medieval crowns of EasternA cache of precious metal regalia recently discovered in a Lithuanian cathedral sheds light on medieval royalty.
New NASA robot with X-rayAn artist's illustration of Earth's magnetosphere.
Runners! Here's everything youIt's the start of your spring marathon training, and here is everything you need, from the best running shoes to a home treadmill
We finally know where theA detailed look at Yellowstone's magma storage system finds that only one region is likely to host liquid magma in the long term.
Why sabre-toothed animalsSabre teeth can be ideal for puncturing the flesh of prey, which may explain why they evolved in different groups of mammals at least five times
Keeping space tidy shouldThe United Nations has 17 sustainable development goals that all member states have signed up to in an effort to balance economics and the environment - and now researchers say we need a new one to... ensure we keep space junk under control
Photoacoustic spectroscopyResearchers have developed a new method for quickly detecting and identifying very low concentrations of gases. The new approach, called coherently controlled quartz-enhanced photoacoustic... spectroscopy, could form the basis for highly sensitive real-time sensors for applications such as environmental monitoring, breath analysis and chemical process control.

Vortex Solo R/T 8x36 monocular review

Live Science - 9 Jan 2025 17:00
Vortex Solo R/T 8x36 monocularWe'll be exploring the Vortex Solo's capabilities to determine its effectiveness for birding, outdoor activities and basic astronomy.
Small changes can dramaticallyIn a new study published in Nature, researchers at the Indian Institute of Science (IISc) and collaborators show that the efficacy of a commonly used piezoelectric ceramic material can be dramatically... increased just by reducing its thickness and by preventing atomic defects inadvertently formed during manufacturing.
Maths quirk explains whyThe process of solving a crossword puzzle is mathematically similar to well-studied physical systems - but one property makes the game unique
Early Stress Alters Sperm DNA,Childhood stress may leave lasting marks on sperm, altering epigenetic profiles and potentially influencing brain development in offspring. Researchers found that men with high levels of childhood... maltreatment had changes in DNA methylation and non-coding RNA levels in their sperm.
Youthful Brain Stem CellsResearchers have identified a unique stem cell in the young brain capable of maturing into multiple cell types, potentially explaining the origins of autism and glioblastoma. These stem cells show... gene expression patterns that regulate early brain development and, when disrupted, could lead to neurological conditions.

How We Make Life's Toughest Choices

Neuroscience News - 9 Jan 2025 15:02
How We Make Life's ToughestA new study presents a novel framework for understanding transformative life decisions, focusing on their complexity and emotional impact. Researchers identified five key dimensions--conflicting cues,... change of self, uncertain experiential value, irreversibility, and risk--that shape these decisions.
Parents stop finding diapersThe extent to which parents feel disgust appears to come and go, which could be important for their children's health