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SpaceX’s first thrice-flown Cargo Dragon returns from orbit with Starship tiles intact
After a flawless reentry and splashdown on August 27th, SpaceX’s first thrice-flown Cargo Dragon spacecraft completed its latest mission, arriving in Port of Los Angeles aboard SpaceX vessel NRC Quest.
The successful completion of NASA Commercial Resupply Mission 18 (CRS-18) means that SpaceX is officially the first and only company to launch the same orbital spacecraft three times. Meanwhile, Cargo Dragon capsule C108 also happened to mark the first known orbital flight test of hardware that may be destined for use on SpaceX’s next-generation Starship launch vehicle, taking the shape of four ceramic tiles installed as part of its ablative PICA-X heat shield.
Cargo Dragon’s CRS-18 mission successfully lifted off on its way to the International Space Station (ISS) on July 25th and was berthed to the ISS roughly two days later, completed its delivery of several tons worth of cargo. During the launch webcast, one of the SpaceX hosts noted that black tiles visible on Cargo Dragon’s heat shield – distinct beside its silvery water-sealed PICA-X tiles – were prototypes of a ceramic heat shield material being analyzed for possible use on Starship.
CEO Elon Musk confirmed this after the first launch attempt was scrubbed by weather, stating that SpaceX was looking into the use of “thin [ceramic] tiles” to protect Starship’s windward (atmosphere-facing) half during orbital reentries. Prior to this development, Musk had proposed and posted videos of real-world tests of a steel Starship heat shield concept, in which extra energy could be wicked away by ‘transpiring’ liquid oxygen or methane through microscopic holes on each tile’s leading edge.
Although particular species of stainless steel do feature exceptionally high melting points and structural characteristics at ultra-high temperatures (> 1400C/2500F), some unofficial analyses of the numbers involved indicated that the density and weight of steel could rapidly hinder any benefits derived from its use as a heat shield. Musk appeared to confirm this in his July 24th comments, indicating that thin ceramic tiles on the windward side and nothing on the leeward side of Starship looked like the “lightest option”.
Indeed, ceramics were so prevalent on the Space Shuttle – the only semi-routinely reusable space plane ever developed – in large part because they can be made spectacularly light. The Shuttle’s main ceramic tiles had a density of 155 kg/m³ (9 lb/ft³), about five times denser than styrofoam or roughly the same density as freshly-fallen snow and balsa wood. Stainless steel is about 50 times denser, on average. To use Musk’s own 2017 turn-of-phrase, adding thick steel tiles to Starship’s already-steel skin was probably a bit too much like “building a box in a box”, whereas prioritizing ceramic tiles presumably cuts the shield’s mass by a factor of something like 20-100+.
Although the Shuttle did make extensive use of ceramic shielding, that shielding – specifically, reinforced carbon-carbon (RCC) tiles about as fragile as the material people are familiar with – and a mixture of organizational ineptitude infamously lead to the death 7 NASA astronauts and was generally a nightmare to deal with. SpaceX certainly won’t have to deal with the foam and solid rocket boosters that a lot of Shuttle’s ceramic problems can be traced to, but the company will likely be laser-focused on producing a form of ceramic shielding that isn’t nearly as fragile as Shuttle-derived materials.
The fact that Cargo Dragon’s ceramic Starship tile prototypes appear to be almost completely unscathed after their first orbital reentry is an excellent sign that SpaceX is making progress in the materials design and certification department, or is at least taking flight-testing extremely seriously.
SpaceX CEO Elon Musk is expected to provide an official update on Starship no earlier than late September, a presentation that will likely include details about the route the company is taking with the massive spaceship’s heat shielding.
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Elon Musk
Elon Musk teases Tesla Optimus Gen 3 capabilities: ‘So many improvements’
If you thought Optimus Gen 2 was impressive, Tesla might have a surprise for you.

Elon Musk has teased that huge improvements are coming to Tesla’s Optimus humanoid robot, which is arguably the product that the company is developing with the most potential for everyday use by consumers and valuation increases from a financial perspective.
Optimus is still in the development stages, but Tesla has made great strides in its development over the past several years. It started as a simple idea that was unveiled with a human being in a spandex suit.
Tesla posts Optimus’ most impressive video demonstration yet
Just a few years later, Tesla has developed several humanoid robot prototypes that have made their way to influencers and have lent a helping hand around the company’s manufacturing facilities.
Tesla has already introduced two generations of Optimus, as the most recent release featured a vast number of improvements from the initial version.
The following is a list of things Tesla improved upon with Optimus Gen 2 compared to Gen 1:
- Tesla introduced a weight reduction of roughly 22 pounds, improving efficiency and agility
- Optimus Gen 2 had a walking speed that improved by 30 percent over Gen 1
- Tesla developed more capable hands that had 22 degrees of freedom, double that of Gen 1. This improved object handling
- Optimus Gen 2 had a 2-degree-of-freedom neck, as Gen 1’s was fixed
- Tesla integrated actuators and sensors for better performance. This includes things like foot force/torque sensing, articulated toe sections that are close to human foot geometry for better balance and movement
- Optimus Gen 2 has 28 degrees of overall freedom, improving flexibility from the first generation
- Tesla’s Optimus Gen 2 can do more than Gen 1, and has shown improved motor control and precision, doing things like squats, yoga poses, dancing, and even poaching an egg
These changes essentially brought Tesla closer to what will be the Optimus version that makes it to production. The company has plans to start production for the public in 2026, but some units will be manufactured for internal use within its factories as soon as this year. Tesla has said it could scale to 100,000 units or more by next year.
Musk also revealed to Teslarati recently that the company is in the process of building the production line that will bring manufacturing rates of Optimus to that level.
However, there is another design of Optimus coming, and Musk says it will feature “so many improvements”:
So many improvements to come in the next design of Optimus
— Elon Musk (@elonmusk) June 18, 2025
Tesla has said that Optimus will have the capability to perform tedious and time-consuming tasks like folding laundry, babysitting, cooking, walking the dog, and plenty of other things. However, it will be super impressive to see it do things that require true coordination, like threading a needle, for example.
Musk did not hint toward any specific developments that Tesla will aim for with Optimus Gen 3, but the sky is the limit, especially as it will be performing some manufacturing tasks across its factories.
Elon Musk
Elon Musk slams Bloomberg’s shocking xAI cash burn claims
Musk stated that “Bloomberg is talking nonsense.”

Elon Musk has forcefully rejected Bloomberg News’ claims that his artificial intelligence startup, xAI, is hemorrhaging $1 billion monthly.
In a post on X, Musk stated that “Bloomberg is talking nonsense.” He also acknowledged an X user’s comment that people “really have no idea what’s at stake” with AI.
Bloomberg‘s Allegations and Musk’s Rebuttal
The Bloomberg News report painted a dire picture of xAI’s finances. Citing people reportedly familiar with the matter, the news outlet claimed that xAI burns $1 billion a month as costs for building advanced AI models outpaced the company’s limited revenues.
Bloomberg alleged that xAI is planning to spend over half of a proposed $9.3 billion fundraising haul in three months, with a projected $13 billion loss in 2025. The report also claimed that of the $14 billion that xAI has raised since 2023, only $4 billion remained by Q1 2025. Even this amount, the news outlet alleged, will be nearly depleted in Q2.
xAI did not comment on Bloomberg‘s claims, though Elon Musk shared his thoughts on the matter on social media platform X. In response to an X user who quoted the publication’s article, Musk noted that “Bloomberg is talking nonsense.” Musk, however, did not provide further details as to why the publication’s report was fallacious.
xAI’s Bright Horizon
Despite Bloomberg‘s claims, even the publication noted that xAI’s prospects are promising. The company, now merged with X, aims to leverage the platform’s vast data archives for model training, which could reduce costs compared to rivals like OpenAI. Tapping into X also allows xAI to access real-time information from users across the globe.
xAI’s valuation reportedly soared to $80 billion by Q1 2025, up from $51 billion in 2024. The AI startup has attracted heavyweight investors such as Andreessen Horowitz, Sequoia Capital, and VY Capital so far, and optimistic projections point to profitability possibly being attained by 2027. This would be quite a feat for xAI as OpenAI, the AI startup’s biggest rival, is still looking at 2029 as the year it could become cash flow positive.
Elon Musk
xAI supercomputer faces lawsuit over air pollution concerns
NAACP & environmental groups are suing Elon Musk’s xAI over turbine emissions at its Colossus supercomputer site.

The xAI supercomputer, Colossus, faces a potential lawsuit from the NAACP and the Southern Environmental Law Center over pollution concerns tied to its gas-powered turbines. The facility has sparked debate over its environmental impact versus economic benefits.
The xAI data center has been operational since last year. The company used pollution-emitting turbines without an air permit, citing a 364-day exemption. Southern Environmental Law Center attorney Patrick Anderson disputed xAI’s exemption, stating: “there is no such exemption for turbines — and that regardless, it has now been more than 364 days.”
The groups issued a 60-day notice of intent to sue under the Clean Air Act, challenging xAI’s permit application under review by the Shelby County Health Department.
According to AP, critics argue the turbines emit smog, carbon dioxide, nitrogen oxides, and formaldehyde, worsening health risks in an area with cancer rates four times the national average.
“The permit itself says emissions from the site ‘will be an area source for hazardous air pollutants,’” the Southern Environmental Law Center noted, alleging Clean Air Act violations.
Opponents claim xAI installed up to 35 turbines—exceeding the 15 requested—without community oversight, straining Memphis’s power grid.
xAI responded: “The temporary power generation units are operating in compliance with all applicable laws.”
The company highlighted its economic contributions, including billions in investments, millions in taxes, and hundreds of jobs. At an April community meeting, xAI’s Brent Mayo underscored that the “tax revenue will support vital programs like public safety, health, human services, education, firefighters, police, parks, and so much more.” He projected that xAI would generate over $100 million in tax revenue by next year. The company is also investing $35 million in a power substation and $80 million in a water recycling plant.
Additionally, xAI is transitioning to sustainable power, particularly Tesla Megapacks. It is actively working on demobilizing the gas turbines.
“The temporary natural gas turbines that were being used to power the [xAI’s] Phase I GPUs prior to grid connection are now being demobilized and will be removed from the site over the next two months,” shared the Greater Memphis Chamber. xAI brought Tesla Megapack batteries and a 150-megawatt substation online earlier this year.
Despite xAI’s expansion to a second 1-million-square-foot site, the lawsuit threat underscores tensions between innovation and environmental justice.
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