In dim light a cat sees much better than you do, as do dogs and nocturnal animals. That's because the structure of a cat's eye has a tapetum lucidum, a mirror-like layer immediately behind the retina. Light entering the eye ...
Most artificial intelligence (AI) systems try to replicate biological mechanisms and behaviors observed in nature. One key example of this is electronic synapses (e-synapses), which try to reproduce junctions between nerve ...
(Phys.org) —Defining the essential character of the action potential of neurons has proven to be an elusive task. As typically happens, the biggest advances seem to have been made early on. In this case it was Hodgkin and ...
(PhysOrg.com) -- Scientists have a good overall understanding of human vision: when light enters our eyes, it is focused by the lens and strikes the retina in the back of the eye. The light causes some of the millions of ...
Jaws are bone- or cartilage-based structures that hold together teeth in the mouth of most vertebrates (i.e., all animal species with a backbone or spinal column). While these crucial structures have been the focus of numerous ...
Jellyfish are more advanced than once thought. A new study from the University of Copenhagen has demonstrated that Caribbean box jellyfish can learn at a much more complex level than ever imagined—despite only having one ...
Plants & Animals
Sep 22, 2023
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353
Scientists have identified a molecule that plays a key role in how cells detect when they are being pushed or pulled which could lead to the development of future drugs for obesity, osteoporosis, and inflammatory diseases.
Cell & Microbiology
Aug 17, 2023
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46
A group of molecular and chemical biologists at the University of California, San Diego, has found possible evidence of interdomain horizontal gene transfer leading to the development of the eye in vertebrates. In their study, ...
The CT-scanned skull of a 319-million-year-old fossilized fish, pulled from a coal mine in England more than a century ago, has revealed the oldest example of a well-preserved vertebrate brain.
Evolution
Feb 1, 2023
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198
A team of researchers affiliated with several institutions in the U.S. and Brazil has found evidence that pumpkin toadlets (Brachycephalus) have poor jumping skills because their inner ear canals are too small. In their paper ...
A nerve is an enclosed, cable-like bundle of peripheral axons (the long, slender projections of neurons). A nerve provides a common pathway for the electrochemical nerve impulses that are transmitted along each of the axons. Nerves are found only in the peripheral nervous system. In the central nervous system, the analogous structures are known as tracts. Neurons are sometimes called nerve cells, though this term is technically inaccurate since many neurons do not form nerves, and nerves also include non-neuronal Schwann cells that coat the axons in myelin.
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