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The debate over how long our brains keep making new nerve cells heats up Adult mice and other rodents sprout new nerve cells in memory-related parts of their brains. People, not so much. That’s the surprising conclusion of a series of experiments on human brains of various ages  first described at a meeting  in November . A  more complete description  of the finding, published online March 7 in  Nature , gives heft to the controversial result, as well as ammo to researchers looking for reasons to be skeptical of the findings. In contrast to earlier prominent studies, Shawn Sorrells of the University of California, San Francisco and his colleagues failed to find newborn nerve cells in the memory-related hippocampi of adult brains. The team looked for these cells in nonliving brain samples in two ways: molecular markers that tag dividing cells and young nerve cells, and telltale shapes of newborn cells. Using these metrics, the researchers saw signs of n...

Google's new quantum processor  could soon outperform classic  supercomputers With the  quantum computing  race heating up between Google, IBM and Intel, it feels like we're hurtling towards quantum supremacy, that milestone when a quantum computer outperforms a classical one for the first time. Bringing us ever closer, Google has now unveiled Bristlecone, a new quantum computer chip with the record-setting power of 72 quantum bits (qubits). Traditional computers perform their calculations in binary, so every bit of data is represented as either a zero or a one. Thanks to the quirky science that is quantum mechanics, a qubit can be in a superposition of both, effectively representing both a zero and a one at the same time. That means the power of a quantum computing system scales exponentially – two qubits can represent four states at once (00, 01, 10 and 11), three qubits represent eight, and so on. As a result, quantum computers are grea...

In this composite image, derived from data collected by the Jovian Infrared Auroral Mapper (JIRAM) instrument aboard NASA's Juno mission to Jupiter, shows the central cyclone at the planet's north pole and the eight cyclones that encircle it  Nasa Jupiter is covered in intense, massive storms far more complex than anyone had expected, Nasa has revealed. The geometric clusters of cyclones that cover the planet's poles are just one of the various discoveries reported by scientists studying data sent back from Nasa's Juno spacecraft, which is circling the planet. The team has seen the cyclones churning in Jupiter's deep atmosphere in far greater detail than ever before One group uncovered a constellation of nine cyclones over Jupiter's north pole and six over the south pole. The wind speeds exceed Category 5 hurricane strength in places, reaching 220 mph (350 kph).  The massive storms haven't changed position much — or merged — since ob...

Precision Qubits Achieve Major Quantum Computing Milestone The unique Australian approach of creating quantum bits from precisely positioned individual atoms in silicon is reaping major rewards, with UNSW Sydney-led scientists showing for the first time that they can make two of these atom qubits “talk” to each other. The team – led by UNSW Professor Michelle Simmons, Director of the Centre of Excellence for Quantum Computation and Communication Technology, or CQC2T – is the only group in the world that has the ability to see the exact position of their qubits in the solid state. Simmons’ team creates the atom qubits by precisely positioning and encapsulating individual phosphorus atoms within a silicon chip. Information is stored on the quantum spin of a single phosphorus electron. The team’s latest advance – the first observation of controllable interactions between two of these qubits – is published in the journal  Nature Communications . It follows two other rece...

{{[This post is from chemistryworld.com be a regular visitor of chemistryworld.com to see more such posts]}} https://www.chemistryworld.com/news/boron-clusters-turn-titanium-oxide-to-the-dark-side-/3008741.article Boron clusters turn titanium oxide to the dark side Titanium-tipped ‘hedgehog’ molecules become a robust – and black – high-performance electronic material US researchers have expanded the capabilities of the key light-harvesting material titanium dioxide by eliminating the very property that makes it most recognisable – its bright white colouring.  Alexander Spokoyny  at the University of California Los Angeles (UCLA) and his colleagues have combined titanium dioxide with boron clusters in a high-temperature process he says may be unique. ‘Any organic molecule would get destroyed,’ Spokoyny tells  Chemistry World . ‘Because these boron clusters are so robust you can carry them through 500˚C annealing in air and they remain in a network of what...

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