Does the human brain have an Achilles heel that ultimately leads to autism? With a revolutionary novel system that combines brain organoid technology and intricate genetics, researchers can now comprehensively test the effect ...
Sep 13, 2023
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When you're sick with a fever, your doctor will likely tell you it's a sign that your immune system is defending you against an infection. Fever typically results from immune cells at infected sites sending chemical signals ...
Sep 11, 2023
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The COVID-19 pandemic was probably caused by the transmission of the SARS-CoV-2 virus from animals to humans, and it has been reported anecdotally that the virus can pass from humans to different animal species, too.
Sep 5, 2023
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Walking is a complex mechanism involving both automatic processes and conscious control. Its dysfunction can have multiple, sometimes extremely subtle causes, within the motor cortex, brain stem, spinal cord, or muscles. ...
Sep 4, 2023
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Glaucoma and macular degeneration cause blindness in millions of people every year. Hundreds of genes have been implicated for increasing susceptibility to the diseases, and such genes are often starting points for therapies ...
Aug 28, 2023
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In their continuing work to limit the impact of COVID-19, Emory University researchers have, for the first time in nonhuman primates, studied how modulating the signaling of type 1 Interferon (IFN-I), one of the body's initial ...
Aug 8, 2023
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Averting our eyes from things that scare us may be due to a specific cluster of neurons in a visual region of the brain, according to new research at the University of Tokyo, published in Nature Communications.
Jul 13, 2023
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An international study has accurately categorized tumor and immune cells of non-human animal species by applying an artificial intelligence (AI) algorithm that was trained on human lung cancer samples.
Jun 30, 2023
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In addition to communicating with neurotransmitters, the brain also uses small proteins called neuropeptides. Neuropeptides send signals between neurons, working similarly to neurotransmitters but with key differences like ...
May 11, 2023
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For decades, neuroscientists have been trying to understand the neural mechanisms underpinning different social behaviors, including aggression. Aggressive, violent, or confrontational behaviors are common among humans and ...
In biology, a species is:
There are many definitions of what kind of unit a species is (or should be). A common definition is that of a group of organisms capable of interbreeding and producing fertile offspring, and separated from other such groups with which interbreeding does not (normally) happen. Other definitions may focus on similarity of DNA or morphology. Some species are further subdivided into subspecies, and here also there is no close agreement on the criteria to be used.
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