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Meteorites give new insights into Martian water

A view of Mars. Credit: NASA/JPL-Caltech

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Mars is a dry, desert world devoid of any life (that we know of). But once upon a time, that wasn’t the case. Data collected by the robotic emissaries we’ve sent to explore the planet on our behalf indicate that the red planet was once a lush and wet world.

However, scientists are still trying to piece together Martian history to understand what happened to the planet’s water. While we know much of it was lost when the planet’s atmosphere was stripped away, what we don’t know is where the water originated from. Researchers uncovered a crucial clue in Martian meteorites found here on Earth.

“A lot of people have been trying to figure out Mars’ water history,” Jessica Barnes, an assistant professor of planetary sciences in the University of Arizona Lunar and Planetary Laboratory, said in a statement. “Like, where did water come from? How long was it in the crust (surface) of Mars? Where did Mars’ interior water come from? What can water tell us about how Mars formed and evolved?”

A view of the Northwest Africa 7034 meteorite (aka Black Beauty). Credit: Institute of Meteoritics UNM

Like the Earth, Mars is made of different layers: a crust, mantle, and a core. Meteorites, like the ones that fell to Earth, are made of the Martian crust, which can tell us a lot about the planet’s composition when the pieces are analyzed. According to a study published this week in Nature Geoscience, there could be at least two distinct reservoirs of ancient water lurking below the Martian surface. Each with its own (different) chemical signature.

This means that Mars probably never had a global ocean of magma beneath its surface like we do on Earth.

For this study, Barnes and her team looked for clues as to the Mars’ water history by analyzing the ratio of two types (isotopes) of hydrogen. They’re not the first to do so, but previous results have been very inconsistent.

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To better understand how the planet formed and where its water came from, the researchers examined two different meteorites: a coin-sized sample known as Black Beauty (or NWA 7034), which formed when a huge impact cemented together various pieces of the Martian crust, and Allan Hills 84001 (ALH84001), a sample once thought to contain Martian microbes. The data shows that water comes from two different sources.

A view of the ALH84001, Alan Hills meteorite. Credit: NASA

The team was searching for different isotopes of hydrogen — light hydrogen and heavy hydrogen — which can help trace the origin of water in rocks. (Isotopes are variations of chemical elements, with different numbers of neutrons.)

“Light hydrogen” contains one proton (and no neutrons) in its nucleus, whereas “heavy hydrogen,” also known as deuterium, contains one proton and one neutron in its core. The ratio of these two isotopes act like a fossil record of water, telling a planetary scientist its origin.

Here on Earth, protium (or light hydrogen) is the most abundant isotope. It’s found in the atmosphere, in rocks, and the ocean. On Mars, however, deuterium (heavy hydrogen) is the most abundant in the atmosphere, while Martian rocks contain a range of ratios from Earth-like to Mars-like.

To better understand the vast variation, Barnes and her team decided to focus on samples they knew came from the Martian crust — Black Beauty and Alan Hills. The team found that both samples interacted with water at different point in Mars’ history, but had similar isotope ratios, that was very similar to younger rocks analyzed by the Curiosity rover.

Curiosity drills into the ground to analyze samples. Credit: NASA/JPL-Caltech

This data suggested a surprising result: that the chemical composition of that water hasn’t changed for nearly 4 billion years.

“Martian meteorites basically plot all over the place, and so trying to figure out what these samples are telling us about water in the mantle of Mars has historically been a challenge,” Barnes said.”The fact that our data for the crust was so different prompted us to go back through the scientific literature and scrutinize the data.”

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So the team compared their results to previous isotope studies, where the meteorites originated in the Martian mantle. They discovered that the isotope ratios were consistent with two types of volcanic rock, known as shergottite, that’s found in the Martian mantle.

A view of the interior of Earth, Mars, and the Moon. Credit: NASA

This means that the water within the meteorite samples came from two different sources. It also indicates that Mars lacked a global magma ocean, which would have made the mantle more consistent in its composition.

“These two different sources of water in Mars’ interior might be telling us something about the kinds of objects that were available to coalesce into the inner, rocky planets,” Barnes said.

Meaning two distinct planetary precursors with vastly different water contents could have collided, but never thoroughly mixed. And understanding how Mars formed is essential for understanding its past habitability and potential for life.

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JB Straubel’s Redwood launches energy business focused on second-life EV batteries

Redwood stated that many EV battery packs retain more than 50% of their capacity after being retired from vehicles.

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Credit: Redwood Materials

Redwood Materials, the battery recycling firm founded by Tesla co-founder JB Straubel, has launched a new venture called Redwood Energy. The business aims to repurpose used electric vehicle batteries into large-scale, low-cost energy storage systems.

In a post on X, Redwood revealed that it has already deployed a 12 MW, 63 MWh microgrid powered entirely by second-life EV batteries. The system is currently powering a modular data center for Crusoe AI, and it already operates at a lower cost than conventional solutions.

Repurposed batteries for scalable storage

Redwood Energy is designed to bridge the gap between battery recovery and recycling by extracting value from discarded EV packs that still hold usable charge. In a blog post, Redwood stated that many EV battery packs retain more than 50% of their capacity after being retired from vehicles. That remaining energy is well suited for stationary storage applications even without recycling.

The process begins with Redwood’s collection and diagnostics system, which identifies battery packs that are still suitable for reuse. Those packs are then integrated into modular energy systems that can store energy from solar, wind, or the grid. Once the batteries reach true end-of-life, they are recycled through Redwood’s closed-loop system to recover critical minerals.

Meeting the demands of an AI-driven grid

Redwood estimates that more than 100,000 EVs will be retired this year in the United States, with millions more currently on the road. These vehicles represent hundreds of gigawatt-hours of storage potential. These resources are coming in at the right time, as electricity demand is rising rapidly amid the rise of artificial intelligence, which tends to be power-hungry.

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Redwood Energy already has more than 1 GWh of second-life batteries in its deployment pipeline. That figure is expected to grow to 5 GWh in the coming year. Larger 100 MW projects are also in development.

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Investor's Corner

Tesla gets $475 price target from Benchmark amid initial Robotaxi rollout

Tesla’s limited rollout of its Robotaxi service in Austin is already catching the eye of Wall Street.

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Credit: Tesla

Venture capital firm Benchmark recently reiterated its “Buy” rating and raised its price target on Tesla stock (NASDAQ: TSLA) from $350 to $475 per share, citing the company’s initial Robotaxi service deployment as a sign of future growth potential.

Benchmark analyst Mickey Legg praised the Robotaxi service pilot’s “controlled and safety-first approach,” adding that it could help Tesla earn the trust of regulators and the general public.

Confidence in camera-based autonomy

Legg reiterated Benchmark’s belief in Tesla’s vision-only approach to autonomous driving. “We are a believer in Tesla’s camera-focused approach that is not only cost effective but also scalable,” he noted. 

The analyst contrasted Tesla’s simple setup with the more expensive hardware stacks used by competitors like Waymo, which use various sophisticated sensors that hike up costs, as noted in an Investing.com report. Compared to Tesla’s Model Y Robotaxis, Waymo’s self-driving cars are significantly more expensive.

He also pointed to upcoming Texas regulations set to take effect in September, suggesting they could help create a regulatory framework favorable to autonomous services in other cities.

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“New regulations for autonomous vehicles are set to go into place on Sept. 1 in TX that we believe will further help win trust and pave the way for expansion to additional cities,” the analyst wrote.

https://twitter.com/herbertong/status/1938287117441855616?s=10

Tesla as a robotics powerhouse

Beyond robotaxis, Legg sees Tesla evolving beyond its roots as an electric vehicle maker. He noted that Tesla’s humanoid robot, Optimus, could be a long-term growth driver alongside new vehicle programs and other future initiatives.

“In our view, the company is undergoing an evolution from a trailblazing vehicle OEM to a high-tech automation and robotics company with unmatched domestic manufacturing scale,” he wrote.

Benchmark noted that Tesla stock had rebounded over 50% from its April lows, driven in part by easing tariff concerns and growing momentum around autonomy. With its initial Robotaxi rollout now underway, the firm has returned to its previous $475 per share target and reaffirmed TSLA as a Benchmark Top Pick for 2025.

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Tesla is testing a new way to eliminate a rare but concerning Supercharger issue

Tesla is testing a new way to end a rare issue at Superchargers, and its internal pilot program has already started.

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tesla supercharger
Credit: Tesla

Tesla is now testing a new way to eliminate a rare but concerning issue that can arise at Superchargers, especially as the company’s vehicles become more popular.

Tesla’s Supercharger Network is the most robust in the world, but the company has opened it up to other manufacturers, which makes the network even more congested than it already is.

Superchargers are continually being built, and existing stations are undergoing expansion in congested areas. However, there is one rare issue that still arises from time to time, and that’s the case of drivers cutting in line to charge before another vehicle that arrived before they did.

Tesla is rolling out a new ‘Supercharger queue’ in an effort to end one issue

A few months ago, Tesla said it would start testing a “virtual queuing” system that would tell cars what their position is in line. This would eliminate any instances of confusion between drivers and would also keep cutters from butting in front of those who arrived before them.

Now, Tesla is officially testing the program, according to Max de Zegher, the company’s North American charging head:

Public pilots will begin soon at select sites after Tesla completes its internal testing. Admittedly, this is an incredibly rare issue, but it is something that is worth confronting because it will eliminate confrontations at Superchargers.

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