Quanta Magazine > 0; if (typeof predicate !== ‘function’) { throw new TypeError(‘predicate must be a function’); } var thisArg = arguments[1]; var k = 0; while (k We care about your data, and we’d like to use cookies to give you a smooth browsing experience. Please agree and read more about our privacy policy.Agree… Continue reading Ocean Vent Explorer Guides NASA’s Look at Icy Alien Worlds
Tag: Quantum Stuff
Scientists Create Human Embryo-Like Structures with Stem Cells
Scientists have created synthetic blobs that resemble a 14-day-old human embryo for the first time, meaning they can study embryo development beyond a particularly tricky period of pregnancy. Historically, international rules prevent research on human embryos more than 14 days after fertilization. But the new technique uses stem cells, which have the potential to transform… Continue reading Scientists Create Human Embryo-Like Structures with Stem Cells
Sparse Neural Networks Point Physicists to Useful Data
Graham tried tweaking the CNN approach so that the kernel would only be placed on 3-by-3 sections of the image that contain at least one pixel that has nonzero value (and is not just blank). In this way, he succeeded in producing a system that could efficiently identify handwritten Chinese. It won a 2013 competition… Continue reading Sparse Neural Networks Point Physicists to Useful Data
Brain Waves Synchronize when People Interact
Neuroscientists usually investigate one brain at a time. They observe how neurons fire as a person reads certain words, for example, or plays a video game. As social animals, however, those same scientists do much of their work together—brainstorming hypotheses, puzzling over problems and fine-tuning experimental designs. Increasingly, researchers are bringing that reality into how… Continue reading Brain Waves Synchronize when People Interact
How to Unravel The Recent Mifepristone Rulings
The following essay is reprinted with permission from The Conversation, an online publication covering the latest research. The U.S. Supreme Court issued an emergency ruling on April 21, 2023, that allows continued access to the abortion pill mifepristone in states where abortion is legal. The court’s decision, which included few details and only indicated that Justices Clarence Thomas… Continue reading How to Unravel The Recent Mifepristone Rulings
A New Experiment Casts Doubt on the Leading Theory of the Nucleus
A new measurement of the strong nuclear force, which binds protons and neutrons together, confirms previous hints of an uncomfortable truth: We still don’t have a solid theoretical grasp of even the simplest nuclear systems. To test the strong nuclear force, physicists turned to the helium-4 nucleus, which has two protons and two neutrons. When… Continue reading A New Experiment Casts Doubt on the Leading Theory of the Nucleus
‘Embryo Models’ Challenge Legal, Ethical and Biological Concepts
Embryo models might offer a way to go down that path with even fewer legal and ethical restrictions. They are not legally considered to be embryos because they do not have the potential to grow into viable organisms. So even under present guidelines and regulations in many countries, if embryo models can be grown through… Continue reading ‘Embryo Models’ Challenge Legal, Ethical and Biological Concepts
People Differ Widely in Their Understanding of Even a Simple Concept Such as the Word ‘Penguin’
The Merriam-Webster dictionary defines the word “penguin” as “any of various erect short-legged flightless aquatic birds (family Spheniscidae) of the southern hemisphere.” That description seems simple enough, but definitions are not what people have in mind when they actually use words. Instead people think of concepts: the myriad properties, ideas, examples and associations that spring… Continue reading People Differ Widely in Their Understanding of Even a Simple Concept Such as the Word ‘Penguin’
Some Neural Networks Learn Language Like Humans
How do brains learn? It’s a mystery, one that applies both to the spongy organs in our skulls and to their digital counterparts in our machines. Even though artificial neural networks (ANNs) are built from elaborate webs of artificial neurons, ostensibly mimicking the way our brains process information, we don’t know if they process input… Continue reading Some Neural Networks Learn Language Like Humans
Who Invented the Measurement of Time?
In modern times, clocks underpin everything people do, from work to school to sleep. Timekeeping is also the invisible structure that makes modern infrastructure work. It forms the foundation of the high-speed computers that conduct financial trading and even the GPS system that pinpoints locations on Earth’s surface with unprecedented accuracy. But humans have likely… Continue reading Who Invented the Measurement of Time?