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Elon Musk‘s brain implant startup Neuralink, which was valued at close to $2 billion (roughly Rs. 16,500 crore) in a private fundraising round two years ago, is now worth around $5 billion (roughly Rs. 41,300 crore) based on privately executed stock trades described to Reuters by five sources with knowledge of the matter.

Some purchases by bullish investors boosted the valuation in recent months, ahead of Neuralink’s May 25 announcement that U.S. regulators had approved a human trial on its brain chip, the sources said.

Experts have said it could take several years for Neuralink to secure commercial use clearance. Kip Ludwig, former program director for neural engineering at the U.S. National Institutes of Health (NIH), said he “optimistically” expected Neuralink to take at least 10 more years to commercialize its brain implant. The company also faces other challenges that include federal probes into its handling of animal research.

Following the trial’s approval, however, Neuralink shares were marketed privately to investors in recent days at a $7 billion (roughly Rs. 57,900 crore) valuation, equivalent to $55 (roughly Rs. 4,500) per share, according to an email seen by Reuters. Reuters could not establish whether the seller found buyers for that price. The email cited the U.S. Food and Drug Administration’s (FDA) approval of the clinical trial as grounds for the deal being “sweeter.”

Neuralink executives and Musk did not respond to requests for comment.

Musk has expressed grand ambitions for Neuralink, saying its chip would allow healthy and disabled people alike to pop into neighbourhood facilities for speedy surgical insertions of devices to treat obesity, autism, depression and schizophrenia. He even sees them being used for web-surfing and telepathy. A Neuralink executive recently gave more modest short-term objectives, such as helping paralyzed patients communicate through computerized text without typing.

The stock transactions at a valuation of around $5 billion (roughly Rs. 41,300 crore) have been carried out by shareholders such as employees and the company’s early backers, rather than Neuralink selling new shares to investors. Such so-called secondary trades are an imperfect gauge of a company’s value; their volume is thin and they lack the wider market consensus of a fundraising round or initial public offering (IPO).

Neuralink’s valuation jump in secondary trades is in sharp contrast to other startups. About 85percent of pre-IPO companies are currently valued in secondary trades at an average discount of 47 percent to their last funding round, according to data provider Caplight.

In Neuralink’s last known fundraising in 2021, it raised $205 million (roughly Rs. 1,700 crore) at an approximately $2 billion (roughly Rs. 16,500 crore) valuation, according to data provider Pitchbook.

Many of the recent stock sales have been to relatively small investors, who typically focus more on getting a slice of a company owned by Musk than scrutinizing its valuation. The maximum amount sought for the Neuralink shares marketed for sale at a $7 billion (roughly Rs. 57,900 crore) valuation was just $500,000, according to the email seen by Reuters.

Sim Desai, chief executive of Hiive, an online platform where the shares are traded, said demand for Neuralink stock has been “tremendous.” He pegged the valuation that buyers are willing to pay at around $4.5 billion (roughly Rs. 37,200 crore).

Some biomedical experts are skeptical. Arun Sridhar, a scientist and entrepreneur who specializes in neuromodulation, called Neuralink’s valuation “bonkers” based on how early the brain implant is in its clinical development.

“A study to assess safety and tolerability is in no shape or form valid to justify a $5 billion (roughly Rs. 41,300 crore) valuation,” said Sridhar, who helped launch Galvani Bioelectronics, a developer of implants backed by GSK Plc and Alphabet Inc’s Verily Life Sciences. Galvani is not a competitor of Neuralink because its implants under development will be installed in an artery to the spleen to help treat rheumatoid arthritis, rather than the brain.

Investigations

The FDA initially rejected Neuralink’s request for a human trial last year, citing safety reasons, Reuters has reported. Even after securing approval, the company faces several challenges.

Neuralink has come under scrutiny from U.S. lawmakers after Reuters reported in May that its animal-research board may have violated conflict-of-interest regulations. Neuralink employees who sat on that board, which oversees the welfare of the animals that were being tested, also stood to benefit from the implant’s quick development. Neuralink stock that some of the employees hold has jumped around 150 percent in value in just two years, based on the secondary trades.

The law enforcement arm of the U.S. Department of Agriculture has been investigating Neuralink for potential animal-welfare violations. Neuralink staff told Reuters last year that the company was rushing and botching surgeries on monkeys, pigs and sheep, resulting in far more animal deaths than necessary, as Musk pressured staff to receive FDA approval.

The Department of Transportation is separately probing whether Neuralink illegally transported dangerous pathogens on chips removed from monkey brains without proper containment measures.

Neither Musk nor Neuralink have responded to multiple requests for comment on the probes or the Reuters reports.

© Thomson Reuters 2023
 


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Rare Titan Shadow Transits Will Sweep Across Saturn in Summer 2025

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Rare Titan Shadow Transits Will Sweep Across Saturn in Summer 2025

Saturn’s largest moon Titan will cast its shadow across the planet’s surface in a rare spectacle this summer. Over the coming months, observers on Earth may see a dark “hole” move across Saturn’s disk as Titan passes in front of the planet. This event is tied to a special alignment: roughly every 15 years, Saturn’s rings become edge-on to our view (a ring-plane crossing or equinox). Indeed, in March 2025 the rings briefly vanished as they lined up edge-on, setting the stage for Titan’s shadow to loom large on Saturn’s globe. After this year’s transit season, the configuration won’t recur until about 2040, making these transits uniquely unmissable.

Saturn’s Equinox and Titan’s Transits

According to Space.com, right now Saturn is near its equinox, meaning its tilted rings are edge-on to Earth. This geometry allows Titan’s shadow – a dark spot on Saturn – to sweep across the planet’s face, much like a lunar eclipse but on Saturn. Titan orbits Saturn about every 16 days, so during this alignment we can see its shadow cross Saturn’s disk repeatedly. In fact, roughly ten Titan shadow-transit events are expected during 2025. Three have already occurred (most recently on June 16), and seven more are forecast from July through early October 2025. When visible, each transit looks like a moving dark spot (a “hole”) on Saturn’s bright disk.

Viewing the Titan Shadow Transits

These transits are faint and require planning. A good telescope (at least 200× magnification) is needed to see Titan and its shadow. For viewers in North America, Saturn will be low in the pre-dawn sky during the event dates. According to Sky & Telescope, the remaining 2025 transit dates are July 2, July 18, August 3, August 19, September 4, September 20 and October 6 (local viewing times vary by location).

Early-season events last several hours, but the crossings shorten as the year goes on: by Oct. 6 the shadow is only visible briefly at the exact mid-transit moment. Observers should consult astronomy software and aim for clear skies on those dates, as any clouds or mist will obscure the subtle shadow.

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NASA’s Chandra Reveals Stunning Multi-Wavelength Image of Andromeda Galaxy

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NASA’s Chandra Reveals Stunning Multi-Wavelength Image of Andromeda Galaxy

NASA’s Chandra X-ray Observatory provides a new look at the Andromeda galaxy in this multi-wavelength image that includes X-ray, ultraviolet, optical, infrared, and radio images and illustrates the “collaboration of light” across the spectrum. The structure and future fate of the Milky Way are modelled with the help of Andromeda, which is 2.5 million light years away. This combined image not only shows high-energy radiation from a supermassive black hole but also provides a clear view of the arms and core of M31 in remarkable detail. The light is transformed into a sound with a sonification video, bringing another level of sensation.

Chandra X-ray Data Reveals Black Hole Flares and Dark Matter Legacy in New View of Andromeda

As per NASA’s Chandra team, the X-ray observations — alongside data from ESA’s XMM-Newton, NASA’s GALEX and Spitzer, Planck, IRAS, COBE, Herschel, and more — reveal distinct galactic features. Notably, a flare detected in 2013 from Andromeda’s supermassive black hole showed enhanced X-ray emission. The data also honours astronomer Vera Rubin, whose M31 rotation studies led to the first convincing evidence for dark matter. Rubin is now commemorated on a 2025 U.S. quarter.

Among the release features is a signature sonification, with different categories of light — X-ray, ultraviolet, optical, infrared, and radio — translated into sound tones. Volume is controlled by brightness, pitch by frequency position. The result is a sound map of the galaxy’s internal structure.

The Chandra programme for NASA’s Science Mission Directorate in Washington is managed by NASA’s Marshall Space Flight Centre in Huntsville, Alabama. Chandra’s overseer is the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts.

With this updated M31 panorama in hand, astronomers are in for a beautiful sight, but the broader population is also treated to a sight and sound experience that transports us to our Milky Way’s closest galactic neighbour.

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Could These Meteorites Be from Mercury? New Research Hints at Rare Discovery

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Could These Meteorites Be from Mercury? New Research Hints at Rare Discovery

Scientists have observed whether the meteorites can reach Earth from Mercury. Over thousands of meteorites from Mars and the Moon have been observed, but none have been from Mercury, despite it being a nearby rocky planet. A new study revealed Icarus suggests two meteorites, Ksar Ghilane 022 and Northwest Africa 15915, could belong to Mercurian origin. Such a kind of meteorite can offer a realistic opportunity to study the material of the surface of the planet, if the technical challenges and the cost of sending a spacecraft to Mercury are met.

New Meteorite Samples Show Strong Similarities

As per the new studies reported to Physics.org , Meteorite NWA 7325 and aubrites in the past were considered to be possibly from Mercury. However, the mineral composition of their samples has inconsistencies with the known surface data from the Messenger mission of NASA. Aubrites formed on a planet similar in size to Mercury, lacking spectral and chemical similarities, and further weakened as Mercurian fragments.

Ksar Ghilane 022 and NWA 15915, the new samples, share many traits of Mercury crust, with olivine, oldhamite, pyroxene, and minor albitic plagioclase. The oxygen composition of these matched with the aubrites, signalling a similar planetary origin and putting them among strong Mercurian members.

Key Differences Raise Scientific Questions

There are key differences even after that, and the two meteorites contain very little plagioclase than on the Mercury surface, and are about 4,528 million years older than Mercury’s surface material. If they are from Mercury, there is a possibility that they can represent an ancient crust which is no longer visible on the planet.

Future Missions and Scientific Verification

Relating a meteorite to a particular planet is quite difficult without direct samples. BepiColombo missions are orbiting Mercury currently, and can offer valuable insights to confirm meteorites source. Mercurian meteorites can get valuable insights into the formation, composition and history of the planet. There are further findings to be presented at the Meteoritical Society Meeting 2025 in Australia.

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