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SpaceX’s upgraded Starship gets frosty during cryogenic proof test
Update: SpaceX is well into Starship SN15’s first cryogenic proof test and is in the process of loading the upgraded steel rocket with hundreds of tons of supercool liquid nitrogen (LN2).
As a result, the 50m (165 ft) tall spacecraft and upper stage prototype has developed a coating of frost as its extremely cold cargo quite literally freezes the humid South Texas air onto its steel skin. Stay tuned for updates on the performance of Starship SN15 during its first ‘cryo proof’ and what that means for engine installation and its next big test – a triple-Raptor static fire.
SpaceX has cleared its suborbital South Texas launch pad of all personnel, clearing the way for the Starship serial number 15 (SN15) to kick off the first in a series of big tests.
Outfitted with “hundreds” of upgrades relative to late full-size predecessors SN8, SN9, SN10, and SN11, there’s a chance that SN15 holds the key to SpaceX’s first completely successful high-altitude Starship launch and landing.
Though Starship SN10 managed to land in one piece last month and both it and its three siblings successfully reached nominal 10-12.5 km (6-8 mi) apogees, averaged more than six minutes of controlled flight, and restarted at least one of three Raptor engines without issue, SN10 explodes minutes after touchdown and the other ships suffered various failures of their own 10-30 seconds before landing. At least one vehicle loss (Starship SN9) can be blamed on the failure of one of two Raptor engines to properly ignite.
Starship SN8 made it seconds away from an intact touchdown on the first try before an issue with its advanced pressurization system starved its Raptor engines of fuel. Starship SN10 landed hard – partially leading to its demise – because the quick-fix SpaceX implemented to deal with the pressurization issues SN8 surfaced caused Raptor engines to ingest helium, dramatically lowering their thrust and performance. CEO Elon Musk believes SN11’s even earlier demise was caused by a high-pressure methane leak on one Raptor engine that destroyed avionics and led to a hard-start and violent explosion during landing burn ignition.
While many – if not most – of Starship SN15’s myriad upgrades likely began before most of the SN8-SN11 failure modes were uncovered, it’s not unlikely that SpaceX was already aware of potential weak points and working to fix them. The company’s philosophy largely matches agile development popular in software industries – namely the development of a minimum viable product, followed by a cycle of iterative testing and refinement until a given product is reliably achieving all of its foundational goals.
Now, it’s up to Starship SN15 (as well as SN16, SN17, SN18, and possibly SN19) to carry the torch forward and demonstrate clear progress towards the goal of fielding a reliable, reusable, building-sized spacecraft and upper stage. To do that, SN15 must first act as a pathfinder for those upgrades, beginning with qualification tests on the ground.
The first of those – likely a cryogenic proof test with liquid nitrogen – is scheduled as early as today, sometime between now and 8pm CDT (UTC-5). Stay tuned for updates as Starship SN15 (hopefully) gets frosty for the first time.
Elon Musk
The Boring Company’s Prufrock-2 emerges after completing new Vegas Loop tunnel
The new tunnel measures 2.28 miles, making it the company’s longest single Vegas Loop tunnel to date.
The Boring Company announced that its Prufrock-2 tunnel boring machine (TBM) has completed another Vegas Loop tunnel in Las Vegas. The company shared the update in a post on social media platform X.
According to The Boring Company’s post, the new tunnel measures 2.28 miles, making it the company’s longest single Vegas Loop tunnel to date.
The new tunnel marks the fourth tunnel constructed near Westgate Las Vegas as the Vegas Loop network continues expanding across the city.
The Boring Company also noted that the new tunnel surpassed its previous internal record of 2.26 miles for a single Vegas Loop segment.
Construction of the tunnel involved moving roughly 68,000 cubic yards of dirt. The excavation process also used about 4.8 miles of continuous conveyor belt, powered by six motors totaling 825 horsepower.
The Boring Company’s Prufrock-series all-electric tunnel boring machines are designed to support the rapid expansion of company’s underground transportation projects, including the growing Vegas Loop network. Prufrock machines are designed for reusability, thanks in no small part to their capability to be deployed and retrieved easily through their “porposing” feature.
The Vegas Loop, specifically the Las Vegas Convention Center (LVCC) Loop segment, has already been used during major events. Most recently, the LVCC Loop supported the 2026 CONEXPO-CON/AGG construction trade show, which was held from March 3-7, 2026.
As per The Boring Company, the LVCC Loop transported roughly 82,000 passengers across the convention center campus during the event’s duration.
CONEXPO-CON/AGG is one of the largest construction trade shows in North America, drawing more than 140,000 construction professionals from 128 countries this year.
The LVCC Loop forms the initial segment of the broader Vegas Loop network, which remains under active development as The Boring Company continues building new tunnels throughout the city.
News
Tesla gathers Cybercab fleet in Gigafactory Texas
Images and video of the Cybercab fleet were shared by longtime Giga Texas observer Joe Tegtmeyer in posts on social media platform X.
Tesla appears to be assembling a growing number of Cybercabs at Gigafactory Texas as preparations continue for the vehicle’s mass production. Recent footage shared online has shown over 30 Cybercabs being transported by trucks or staged near testing areas at the facility.
The images and video were shared by longtime Giga Texas observer and drone operator Joe Tegtmeyer in posts on social media platform X.
Interestingly enough, Tegtmeyer noted that many of the Cybercabs being loaded onto transport trucks were still equipped with steering wheels. This suggests that the vehicles are likely testing units rather than the final driverless configuration expected for the company’s Robotaxi service.
The vehicles could potentially be headed to testing sites across the United States as Tesla prepares to expand its Robotaxi fleet.
Additional footage captured at Gigafactory Texas also showed the Cybercab’s side and rear camera washer system operating as vehicles were being loaded onto transport trucks.
The growing number of Cybercabs at Giga Texas comes amidst the company’s announcement that the first production Cybercab has been produced at the facility. Full Cybercab production is expected to begin in April.
The vehicle is expected to play a central role in Tesla’s Robotaxi ambitions as the company looks to expand autonomous ride-hailing operations beyond its early deployments using Model Y vehicles.
Tesla has also linked Cybercab production to its proposed Unboxed manufacturing process, which assembles large vehicle modules separately before integrating them. The approach is intended to reduce production costs and accelerate output.
Musk has also noted that the Cybercab’s ramp will likely begin slowly due to the number of new components and manufacturing steps involved. However, he stated that once the process matures, Cybercab production could scale quickly.
Elon Musk
Elon Musk’s xAI, creator of Grok and Grokipedia, celebrates its third birthday
xAI Memphis highlighted several of its milestones over the years in its celebratory post.
Elon Musk’s artificial intelligence startup xAI has marked its third anniversary. The update was shared in a post from the xAI Memphis account on social media platform X.
xAI Memphis highlighted several of its milestones over the years in its celebratory post.
As per xAI, it has built three massive data centers in the city, launched a coherent cluster of 330,000 GBs, created over 3,000 jobs, and paid over $30 million in taxes to local communities.
xAI’s Memphis operation has become a key part of the company’s infrastructure as the company works to train and deploy its Grok artificial intelligence models. Elon Musk has been quite optimistic about Grok’s potential, noting in the past that the large language model might have a shot at achieving artificial general intelligence (AGI).
xAI’s Memphis’ crown jewel is its Colossus supercomputer cluster. The project was announced in 2024 and has since become the home of one of the world’s largest AI compute facilities. The first phase of Colossus reached its initial 100,000 GPU operational milestone in just 122 days, or just about four months.
Industry figures such as Nvidia CEO Jensen Huang have praised the facility, noting that projects of similar scale typically take two to four years to complete.
xAI has cited Memphis’ central location, skilled workforce, and industrial infrastructure as key reasons for selecting the city as the home of its AI training operations. The company has also emphasized plans to expand the site further as it scales compute capacity for Grok and future AI models.
The Boring Company’s Prufrock-2 emerges after completing new Vegas Loop tunnel
Tesla gathers Cybercab fleet in Gigafactory Texas
