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NASA may prematurely kill long-lived Mars rover with arbitrary wake-up deadline
In a decision with no obvious empirical explanation, JPL’s Opportunity Mars rover project manager John Callas was quoted in an August 30th press release saying that the NASA field center would be “forced to conclude” that the dust storm-stricken rover was effectively beyond saving if it fails to come back to life 45 days after 2018’s massive dust storm can be said to have officially ended.
Below the upbeat-sounding title of this press release is the scarier fact that after tau clears below 1.5, the rover has 45 days to wake up before NASA stops actively trying to revive it. Come on, #WakeUpOppy https://t.co/piCQLeaCEO
— Emily Lakdawalla (@elakdawalla) August 30, 2018
Over the course of that press release, Callas made a number of points that may technically hold at least a few grains of truth, but entirely fail to add up to any satisfactory explanation for the choices described therein. This is underscored in one critical and extended quote:
“If we do not hear back [from Opportunity] after 45 days, the team will be forced to conclude that the Sun-blocking dust and the Martian cold have conspired to cause some type of fault from which the rover will more than likely not recover. At that point, our active phase of reaching out to Opportunity will be at an end. However, in the unlikely chance that there is a large amount of dust sitting on the solar arrays that is blocking the Sun’s energy, we will continue passive listening efforts for several months.” – John Calwell, JPL
Scott Maxwell, a former JPL engineer who led drive planning for rovers Spirit and Opportunity, solidly explained the differences between active and passive recovery attempts:
Because it's a FAQ … "active listening" has two parts: (1) forcing Opportunity's radio, if she's listening, to a particular frequency (because it can drift), and (2) a command to talk to us. Pretty much guaranteed to work if she's awake with her radio on. https://t.co/iaHbHXFKqm
— 🇺🇦ScottMaxwell @marsroverdriver@deepspace.social (@marsroverdriver) August 31, 2018
The JPL press release offers exactly zero explanation for the “45-day” deadline, starting the moment that dust clears from Martian skies near Opportunity to a certain degree, likely to happen within the next few weeks. Nor does it explain why “active” recovery attempts would stop at that point, despite the fact that the PR happens to directly acknowledge the fact that the best time to attempt to actively restore contact Opportunity might be after Mars’ windy season is given a chance to blow accumulated dust off of the rover’s solar arrays.
In fact, while all points Callas/the press release makes may theoretically be valid, the experiences of the actual engineers that have been operating Opportunity and MER sister rover Spirit for nearly two decades suggest that his explanations are utterly shallow and fail even the most cursory comparison with real data.
Thanks largely to a number of comments collected by The Atlantic from past, present, and anonymous employees involved with Opportunity, it would seem that there is no truly empirical way to properly estimate the amount of dust that may or may not be on the rover’s solar arrays, no rational engineering-side explanation for the 45-day ultimatum, no clear excuse for how incredibly short that time-frame is, and essentially zero communication between whoever this decision originates from and the engineers tasked with operating and restoring communications with the forlorn, 15-year old rover.
Most tellingly, this exact impromptu dust-storm-triggered hibernation already occurred several times in the past, and even resulted in the demise of Opportunity’s sister rover Spirit in 2010. The Atlantic notes that when a dust storm forced that rover into hibernation in 2010, JPL mission engineers spent a full ten months actively attempting to resuscitate Spirit, followed by another five months of passive listening before the rescue effort was called off.
Given that Opportunity’s engineers appear to believe that there is every reason to expect that the rover can, has, and should survive 2018’s exceptional Martian dust storm, the only plausible explanation for the arbitrary countdown and potentially premature silencing of one of just two active rovers on Mars is purely political and financial. While it requires VERY little money to operate scientific spacecraft when compared with manufacturing and launch costs, the several millions of dollars needed to fund operations engineers and technicians (roughly $15 million per year for Opportunity) could technically be funneled elsewhere or the employees in question could be redirected to newer programs.
For example, the ~$200 million spent operating the rover from 2004 to 2018 could instead fund considerably less than 20% of the original cost of building and launching both Opportunity and Spirit. This is to say that that cutting operation of functioning spacecraft to save money can be quite fairly compared with throwing an iPhone in the trash because the charging cable ripped because $10 could instead be put towards buying a new phone months or years down the line.
Ultimately, all we can do is hope that Opportunity manages to successfully wake up over the course of the next two or three months. If the rover is unable to do so, chances are sadly high that it will be lost forever once active communications restoration efforts come to an end. With an extraordinarily productive 15 years of exploration nearly under its belt, Opportunity – originally designed with an expected lifespan of ~90 days – would leave behind a legacy that would fail to disappoint even the most ardent cynic. Still, if life may yet remain in the rover, every effort ought to be made to keep the intrepid craft alive.
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Tesla Semi gets strange-but-understandable comparison from Jay Leno
In a recent interview with MotorTrend, legendary comedian and automotive enthusiast Jay Leno shared his impressions after driving Tesla’s long-range Semi truck, offering one of the most vivid descriptions to date:
The Tesla Semi recently received a strange-but-understandable comparison from automotive enthusiast and former long-time late-night television show host Jay Leno.
In a recent interview with MotorTrend, legendary comedian and automotive enthusiast Jay Leno shared his impressions after driving Tesla’s long-range Semi truck, offering one of the most vivid descriptions to date:
“It’s like driving an office building.”
The comparison may seem quirky—office buildings evoke images of immobility rather than motion—but it aptly conveys the experience of commanding a massive 23,000-pound Class 8 electric truck that delivers sports-car acceleration.
Lenotested the production-spec Long Range model, which is rated for up to 500 miles of range. He was visibly impressed by its performance, noting how the enormous vehicle moves with surprising urgency.
“It’s as fast as a Tesla, but it’s like driving an office building,” he remarked. “It’s this huge thing that moves like right now. You go 500 miles. You get 60% charge in 30 minutes. You’re saving on fuel costs. It seems quite good.”
Jay Leno in new interview on what it’s like to drive the @Tesla Semi:
“I was quite impressed with that. It’s a fast as a Tesla, but it’s like driving an office building. It’s this huge thing that moves like right now. You go 500 miles. You get 60% charge in 30 mins. You’re… pic.twitter.com/YU7tk6a6pV
— Sawyer Merritt (@SawyerMerritt) May 8, 2026
The reaction highlights the cognitive dissonance at the core of the Tesla Semi. Traditional diesel semi-trucks are slow, noisy, and expensive to run. The Semi rewrites the rules with instant torque from its tri-motor electric powertrain, producing up to 800 kW.
Despite its size, the truck feels agile thanks to full electric steering assist, upgraded actuators borrowed from the Cybertruck, and a 48-volt electrical architecture that improves responsiveness and efficiency.
Tesla reports real-world energy consumption below 1.7 kWh per mile for the Long Range version. Megacharger stations can deliver a 60% charge in roughly 30 minutes, making the truck suitable for long-haul operations.
Additional features include an electric Power Take-Off (ePTO) capable of 25 kW for trailer refrigeration or other equipment, and a driver-focused cab with a central seating position for optimal visibility and a quiet, high-tech interior.
Fleet operators stand to benefit significantly from the economics. Diesel trucks often cost nearly one dollar per mile when including fuel, maintenance, and downtime.
Tesla projects the Semi can reduce operating costs to as low as 15 cents per mile through cheaper electricity, regenerative braking that minimizes brake wear, and reduced service requirements. While early deployments, like Pepsi’s, focused on shorter routes, the 500-mile variant targets cross-country applications.
Obstacles remain. A fully loaded tractor-trailer can reach 80,000 pounds, which reduces real-world range compared to the unloaded test conditions. Building out a nationwide Megacharger network will be essential for broader adoption. The Semi also carries a higher upfront price than conventional diesels, though total cost of ownership and available incentives frequently tip the scales in its favor over time.
Tesla Semi hauls fresh Cybercab batch as Robotaxi era takes hold
Leno’s “office building” description resonates because it captures the unexpected thrill of piloting something so large yet so capable. As the trucking industry faces pressure to cut emissions and control rising fuel expenses, the Semi offers a compelling alternative that excels in performance, comfort, and efficiency.
Coming from a man who has driven everything from vintage classics to modern hypercars, Leno’s genuine enthusiasm adds weight to the verdict.
The Tesla Semi is emerging as more than an experimental EV—it represents a practical vision for the future of heavy-duty transport where massive rigs accelerate instantly, and the numbers finally make sense. If fleet results continue to validate the claims, the era of diesel dominance could be drawing to a close.
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Tesla expands its mass-market color palette in the U.S.
Delivering a fresh splash of color to its lineup, Tesla is giving U.S. buyers two stunning new blue options that are already turning heads.
Tesla has expanded the color palette it offers on its mass market vehicles in the United States, giving buyers of the Model 3 and Model Y a few additional options than before.
Delivering a fresh splash of color to its lineup, Tesla is giving U.S. buyers two stunning new blue options that are already turning heads. Starting on May 8, the automaker updated its North American configurator to introduce Marine Blue on Model Y Premium trims and Frost Blue exclusively on the Model 3 Performance.
Tesla Model Y and Model 3 Premium get Marine Blue for $1000 in the U.S.!
What do you think? pic.twitter.com/3FqMXcnmru
— TESLARATI (@Teslarati) May 8, 2026
The move replaces the long-running Deep Blue Metallic, a staple for over eight years, and brings previously exclusive shades stateside.
Marine Blue, a deep, rich oceanic hue formerly limited to Europe and Asia-Pacific markets, is now available on Model 3 and Model Y RWD and Long Range AWD Premium variants. Priced at a $1,000 upgrade—standard for Tesla’s premium paints—it delivers a sophisticated, metallic finish that shifts beautifully under light.
Tesla Model Y and Model 3 Premium get Marine Blue for $1000 in the U.S.!
What do you think? pic.twitter.com/3FqMXcnmru
— TESLARATI (@Teslarati) May 8, 2026
Tesla North America highlighted the change directly in an official post, confirming Marine Blue as the new flagship blue for non-Performance models.
Frost Blue, on the other hand, is the real crowd-pleaser for enthusiasts. Previously reserved for the flagship Model S and Model X, this lighter, icy metallic shade is now offered at no extra cost on Model 3 Performance and Model Y Performance trims.
Frost Blue now available on Tesla Model 3 Performance 😤 pic.twitter.com/rLOEh4pTkp
— TESLARATI (@Teslarati) May 8, 2026
Performance buyers effectively get a premium color included in the base price, a smart perk that Tesla has extended to higher-end variants across the board. Early in-person sightings and configurator renders show Frost Blue’s cool, modern vibe popping against the cars’ sleek lines, especially with black wheels and red brake calipers.
The timing couldn’t be better. With Tesla pushing refreshed Model 3 and Model Y refreshes amid growing competition, these updates add visual excitement without major redesigns.
Deep Blue Metallic orders are being transitioned to the new shades, according to customer reports and Tesla communications. In the U.S., Puerto Rico, and Mexico, the options are live now; Canada sees limited Frost Blue availability on the Model 3 Performance.
Tesla’s color strategy continues to evolve, borrowing from higher-end models to refresh mass-market EVs. Now that we bid farewell to the Model S and Model X, some of their colors might be available on the more widely available Model 3 and Model Y.
Elon Musk
Tesla Semi’s official battery capacity leaked by California regulators
A California regulatory filing just confirmed the exact battery size inside each Tesla Semi variant.
A regulatory filing published by the California Air Resources Board in April 2026 has put official numbers on what Tesla Semi owners and fleet buyers have long wanted confirmed: the exact battery capacities of both the Long Range and Standard Range Semi truck variants. CARB is California’s independent air quality regulator, and it certifies zero-emission powertrains before they can be sold or operated in the state. When a manufacturer submits a vehicle for certification, the resulting executive order becomes a public document, making it one of the most reliable sources for confirmed production specs on any EV.
The document lists two certified powertrain configurations. The Long Range Semi carries a usable battery capacity of 822 kWh, while the Standard Range version comes in at 548 kWh. Both use lithium-ion NCMA chemistry and share the same peak and steady-state motor output ratings of 800 kW and 525 kW respectively. Cross-referencing Tesla’s published efficiency figure of approximately 1.7 kWh per mile under full load, the 822 kWh pack supports roughly 480 miles of real-world range, which aligns closely with Tesla’s advertised 500-mile figure for the Long Range trim. The 548 kWh Standard Range pack works out to approximately 320 miles, again consistent with Tesla’s stated 325-mile target.
Here is a direct comparison of the two versions based on the CARB filing and published specs:
| Tesla Semi Spec | Long Range | Standard Range |
| Battery Capacity | 822 kWh | 548 kWh |
| Battery Chemistry | NCMA Li-Ion | NCMA Li-Ion |
| Peak Motor Power | 800 kW | 525 kW |
| Estimated Range | ~500 miles | ~325 miles |
| Efficiency | ~1.7 kWh/mile | ~1.7 kWh/mile |
| Est. Price | ~$290,000 | ~$260,000 |
| GVW Rating | 82,000 lbs | 82,000 lbs |
The timing of this certification is not incidental. On April 29, 2026, Semi Programme Director Dan Priestley confirmed on X that high-volume production is now ramping at Tesla’s dedicated 1.7-million-square-foot facility in Sparks, Nevada. A key advantage of the Nevada location is vertical integration: the 4680 battery cells powering the Semi are manufactured in the same complex, eliminating the supply chain bottleneck that had delayed the program for years.
Tesla’s long-term goal is to reach a production capacity of 50,000 trucks annually at the Nevada factory, which would represent roughly 20 percent of the entire North American Class 8 market. With CARB certification now in hand and the production line running, the regulatory and manufacturing groundwork for that target is in place.
Tesla Semi gets strange-but-understandable comparison from Jay Leno
Tesla expands its mass-market color palette in the U.S.
