You’re crazy for this one, Prince Rupert.
Have you heard of the wild, almost indestructible Prince Rupert’s Drop? Science Alert recently unearthed a video from Smarter Every Day that shows this strong-as-hell glass marvel actually shattering a bullet at a beautiful 150,000 frames per second.
Continue reading “Watch This Indestructible Glass Drop Literally Break a Bullet” »
Computer simulations have struggled to capture the impact of elusive particles called neutrinos on the formation and growth of the large-scale structure of the universe. But now, a research team from Japan has developed a method that overcomes this hurdle.
In a study published this month in the Astrophysical Journal, researchers led by the University of Tsukuba present simulations that accurately depict the role of neutrinos in the evolution of the universe.
Why are these simulations important? One key reason is that they can set constraints on a currently unknown quantity: the neutrino mass. If this quantity is set to a particular value in the simulations and the simulation results differ from observations, that value can be ruled out. However, the constraints can be trusted only if the simulations are accurate, which was not guaranteed in previous work. The team behind this latest research aimed to address this limitation.
Concept cars are a great way for manufacturers to showcase their ideas to the market, but these ideas should have never left the drawing board.
Well… it seems we can still be surprised. 😃
Cornered by a dangerous predator, a gecko can self-amputate its still twitching tail, creating a fleeting moment of distraction — a chance for the lizard to flee with its life.
Small reptiles such as geckos and skinks are well known for this remarkable ability to sacrifice and then rapidly regrow their tails. Now, to scientists’ surprise, it turns out that much larger alligators can regrow theirs too. But only while they’re young.
Continue reading “In an Unexpected Twist It Turns Out Alligators Can Regrow Their Tails Too” »
Peter and Dan discuss transformations in healthcare as a result of the pandemic and consequent stay-at-home orders. Peter envisions a future wherein people don’t go to the hospital when they get sick, but instead have a hospital at their fingertips thanks to sensors, wearables, and an abundance of personalized medical data.
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MIT scientists developed a camel-fur-inspired material that could keep items cool in hot regions without using electricity.
Researchers are a step closer to realizing a new kind of memory that works according to the principles of spintronics which is analogous to, but different from, electronics. Their unique gallium arsenide-based ferromagnetic semiconductor can act as memory by quickly switching its magnetic state in the presence of an induced current at low power. Previously, such current-induced magnetization switching was unstable and drew a lot of power, but this new material both suppresses the instability and lowers the power consumption too.
The field of quantum computing often gets covered in the technical press; however, another emerging field along similar lines tends to get overlooked, and that is spintronics. In a nutshell, spintronic devices could replace some electronic devices and offer greater performance at far low power levels. Electronic devices use the motion of electrons for power and communication. Whereas spintronic devices use a transferable property of stationary electrons, their angular momentum, or spin. It’s a bit like having a line of people pass on a message from one to the other rather than have the person at one end run to the other. Spintronics reduces the effort needed to perform computational or memory functions.
Spintronic-based memory devices are likely to become common as they have a useful feature in that they are nonvolatile, meaning that once they are in a certain state, they maintain that state even without power. Conventional computer memory, such as DRAM and SRAM made of ordinary semiconductors, loses its state when it’s powered off. At the core of experimental spintronic memory devices are magnetic materials that can be magnetized in opposite directions to represent the familiar binary states of 1 or 0, and this switching of states can occur very, very quickly. However, there has been a long and arduous search for the best materials for this job, as magnetizing spintronic materials are no simple matter.
The oxygen evolution reaction (OER) is a chemical process that leads to the generation of molecular oxygen. This reaction is of key importance for the development of clean energy technologies, including water electrolyzers, regenerative fuel cells and rechargeable metal-air batteries.
The extent to which this reaction occurs has so far been limited in many materials, which has restricted the conversion efficiency of some types of energy technologies. Materials scientists have thus been trying to identify alternative materials, including metals, metal oxides and hydroxides, that could be used as electrocatalysts to fuel this reaction. The materials identified so far, however, are far from ideal for large-scale implementation, as they are either not particularly resistant or too expensive.
A class of materials widely investigated as possible electrocatalysts for the OER are metal-organic frameworks (MOFs), hybrid and crystalline compounds that consist of a regular array of positively charged metal ions surrounded by organic molecules. While these materials have promising catalytic properties, scientists have yet to identify optimal strategies to enhance their performance.
Researchers have spotted millions of galaxies in the most detailed radio survey of the southern sky ever conducted. It has smashed previous records for survey speed.
