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24 results for Evolution

An Exception to the Rule: An Intact Sense of Smell Without a Crucial Olfactory Brain Structure
An Exception to the Rule: An Intact Sense of Smell Without a Crucial Olfactory Brain Structure

https://weizmann-usa.org/news-media/news-releases/an-exception-to-the-rule-an-intact-sense-of-smell-without-a-crucial-olfactory-brain-structure/

Nov 06, 2019... Computer-enhanced MRI images of the brains of left-handed women identified two that were missing olfactory bulbs
REHOVOT, ISRAEL—November 6, 2019—Is a pair of brain structures called the olfactory bulbs, which are said to encode our sense of smell, necessary? That is, are they essential to the existence of this sense? Weizmann Institute of Science researchers recently showed that some humans can smell just fine, thank you, without said bulbs. Their finding – that around 0.6% of women, and more specifically, up to 4% of left-handed women, have completely intact senses of smell despite having no olfactory bulbs in their brains – calls into question the accepted notion that this structure is absolutely necessary for the act of smelling. The findings of this research, which were published in Neuron, could shake up certain conventional theories that describe the workings of our sense of smell.

TAGS: Women, Brain, Neuroscience, Evolution, Senses

For the First Time: A Method for Measuring Animal Personality
For the First Time: A Method for Measuring Animal Personality

https://weizmann-usa.org/news-media/news-releases/for-the-first-time-a-method-for-measuring-animal-personality/

Nov 04, 2019... REHOVOT, ISRAEL—November 4, 2019—We might refer to someone’s personality as “mousy,” but in truth, mice have a range of personalities nearly as great as our own. Prof. Alon Chen and members of two groups he heads – one in the Weizmann Institute of Science’s Department of Neurobiology and one in the Max Planck Institute of Psychiatry in Munich, Germany – decided to explore personality specifically in mice. This would enable the scientists to develop a set of objective measurements for this highly slippery concept. A quantitative understanding of the traits that make each animal an individual might help answer some of the open questions in science concerning the connections between genes and behavior. The findings of this research were published in Nature Neuroscience.

TAGS: Genetics, Neuroscience, Evolution

Converging Solutions: Artificial Networks Shed Light on Human Face Recognition
Converging Solutions: Artificial Networks Shed Light on Human Face Recognition

https://weizmann-usa.org/news-media/news-releases/converging-solutions-artificial-networks-shed-light-on-human-face-recognition/

Oct 30, 2019... Pairs of face images that elicited similar (left column) and different (right column) neuronal activation patterns. Each bar shows the response of one electrode to the face in the photo; the higher the bar and the lighter the red, the stronger the response
REHOVOT, ISRAEL—October 30, 2019—Our brains are so primed to recognize faces – or to tell people apart – that we rarely even stop to think about it, but what happens in the brain when it engages in such recognition is still far from understood. In a new study published in Nature Communications, researchers at the Weizmann Institute of Science have shed new light on this issue. They found a striking similarity between the way in which faces are encoded in the brain and successfully performing artificial intelligence (AI) systems known as deep neural networks.

TAGS: Technology, Brain, Neuroscience, Evolution, Artificial intelligence

Scientists Map Mouse Personality
Scientists Map Mouse Personality

https://weizmann-usa.org/news-media/in-the-news/scientists-map-mouse-personality/

Nov 07, 2019... Some mice are curious and explore every new hiding place. Others are more anxious and prefer to stay in their nest. ©MPI f. Molecular Genetics
Scientists at the Max Planck Institute of Psychiatry in Munich, Germany, together with colleagues at the Weizmann Institute of Science in Israel have developed a computational method to objectively measure the personality of mice living in a semi-natural, group environment.

TAGS: Genetics, Neuroscience, Evolution

Do Deep Neural Networks ‘See’ Faces Like Brains Do?
Do Deep Neural Networks ‘See’ Faces Like Brains Do?

https://weizmann-usa.org/news-media/in-the-news/do-deep-neural-networks-see-faces-like-brains-do/

Nov 05, 2019... Recognizing faces is as natural and habitual as can be for human beings. Even with their undeveloped vision, babies can recognize their mother’s face within days, while adults typically know some 5,000 faces. But what actually happens inside our brains during the process of recognizing a face? How are different facial features encoded in our brains? And can artificial intelligence learn to recognize faces the way humans do?

TAGS: Brain, Neuroscience, Evolution

Prof. Ruth Arnon: Lessons from Influenza
Prof. Ruth Arnon: Lessons from Influenza

https://weizmann-usa.org/news-media/feature-stories/prof-ruth-arnon-lessons-from-influenza/

Mar 15, 2020... With infections, as with football, a best offense is often a good defense. But while that strategy works for many infectious diseases, it doesn’t work with influenza; thanks to its readiness to mutate, the influenza virus effectively “shifts the goalposts” each year, requiring a new vaccination.
Renowned Weizmann Institute immunologist Prof. Ruth Arnon is spearheading a new defense—a universal influenza vaccine that is currently in Phase III of the clinical trial process—that focuses on the parts of the virus that stay the same from year to year, gluing the goalpost to the ground once and for all.

TAGS: Culture, Biology, Evolution, Virus, Vaccine

Left-Handed Women’s Quirk Over Sense of Smell
Left-Handed Women’s Quirk Over Sense of Smell

https://weizmann-usa.org/news-media/in-the-news/left-handed-women-s-quirk-over-sense-of-smell/

Nov 07, 2019... Image via Shutterstock
Scientists say they have discovered a biological anomaly that could change how we understand our sense of smell.
The study in the journal Neuron shows some people can smell normally, despite missing the part of the brain that is considered to be crucial for smell - the olfactory bulbs.
Lacking bulbs should cause anosmia (being unable to smell).
Curiously, the phenomenon mostly affects left-handed women, and has never been detected in men.

TAGS: Women, Brain, Neuroscience, Evolution, Senses

The Greenest Diet: Bacteria Switch to Eating Carbon Dioxide
The Greenest Diet: Bacteria Switch to Eating Carbon Dioxide

https://weizmann-usa.org/news-media/news-releases/the-greenest-diet-bacteria-switch-to-eating-carbon-dioxide/

Nov 27, 2019... REHOVOT, ISRAEL—November 27, 2019—Bacteria in the lab of Prof. Ron Milo of the Weizmann Institute of Science have not just sworn off sugar – they have stopped eating all of their normal solid food, existing instead on carbon dioxide (CO2) from their environment. That is, they were able to build all of their biomass from air. This feat, which involved nearly a decade of rational design, genetic engineering, and a sped-up version of evolution in the lab, was reported in Cell. The findings point to means of developing, in the future, carbon-neutral fuels.

TAGS: Environment, Climate change, Biochemistry, Evolution, Bacteria, Alternative energy

A Sniff Test for Coronavirus?
A Sniff Test for Coronavirus?

https://weizmann-usa.org/news-media/feature-stories/a-sniff-test-for-coronavirus/

May 04, 2020... Prof. Noam Sobel, of the Department of Neurobiology, is a leading authority on how olfaction affects human behavior and health. Data emerging from the coronavirus pandemic show that many patients experience a temporary loss of their sense of smell. So dramatic is this loss that, in some countries, patients who report a sudden loss of olfactory acuity are declared to be coronavirus patients, even without further testing. The CDC recently added olfactory loss as a formal symptom of COVID-19.

TAGS: Culture, Neuroscience, Evolution, Virus, Senses

You Can’t Stop Touching Your Face Because You’re Programed To Sniff Your Hand, Scientists Say
You Can’t Stop Touching Your Face Because You’re Programed To Sniff Your Hand, Scientists Say

https://weizmann-usa.org/news-media/in-the-news/you-can-t-stop-touching-your-face-because-you-re-programed-to-sniff-your-hand-scientists-say/

Apr 20, 2020... Humans touch their own faces often because they are subconsciously smelling themselves for a variety of reasons, scientists believe. The team also conducted a survey to see whether people subconsciously smell themselves and others, and found more than half of the participants had smelled a stranger.
The authors of the article titled Are humans constantly but subconsciously smelling themselves? published in the journal Royal Society journal Philosophical Transactions B reviewed existing studies to understand if and why humans smell themselves.

TAGS: Culture, Neuroscience, Evolution, Virus, Senses

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