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    Space news

    Texas 'martian geologist' chosen for NASA's new Mars rover mission

    Natalie Harms, InnovationMap
    Dec 8, 2020 | 3:39 pm

    A Texas geologist has been chosen by NASA as one of the 13 scientists who will be working on a new Mars rover.

    Perseverance is the rover that launched in July and is expected to land on Mars in February. It will be scouting for samples to bring back to study for ancient microbial life, and Kirsten Siebach — an assistant professor of Earth, Environmental and Planetary Sciences at Rice University who calls herself a "martian geologist" — will be among the researchers to work on the project. Her proposal was one of 119 submitted to NASA for funding, according to a Rice press release.

    "Everybody selected to be on the team is expected to put some time into general operations as well as accomplishing their own research," she says in the release. "My co-investigators here at Rice and I will do research to understand the origin of the rocks Perseverance observes, and I will also participate in operating the rover."

    Perseverance is headed for Jezero Crater, a 28-mile-wide area that once hosted a lake and river delta where, according to scientists, microbial life may have existed over 3 billion years ago. Siebach is particularly excited to hopefully find fossils existing in atmospheric carbon dioxide dissolved in water — which usually exists as limestone on Earth.

    "There are huge packages of limestone all over Earth, but for some reason it's extremely rare on Mars," she says. "This particular landing site includes one of the few orbital detections of carbonate and it appears to have a couple of different units including carbonates within this lake deposit. The carbonates will be a highlight of we're looking for, but we're interested in basically all types of minerals."

    Siebach is familiar with rovers — she was a member of the team for NASA's Curiosity rover, which has been exploring Mars since 2012. For this new rover, Siebach knows what to expect.

    "Because there is only one rover, the whole team at NASA has to agree about what to look at, or analyze, or where to drive on any given day," Siebach says in the release. "None of the rovers' actions are unilateral decisions. But it is a privilege to be part of the discussion and to get to argue for observations of rocks that will be important to our understanding of Mars for decades."

    Siebach and her team — which includes Rice data scientist Yueyang Jiang and mineralogist Gelu Costin — are planning to tap into computational and machine-learning methods to map out minerals and discover evidence for former life on Mars. They will also be using a Planetary Instrument for X-ray Lithochemistry, or PIXL, to analyze the materials.

    The return mission isn't expected to return until the early 2030s, so it's a long game for the scientists. However, the samples have the potential to revolutionize what we know about life on Mars with more context than before.

    "Occasionally, something hits Mars hard enough to knock a meteorite out, and it lands on Earth," she says in the release. "We have a few of those. But we've never been able to select where a sample came from and to understand its geologic context. So these samples will be revolutionary."

    ---

    This story originally appeared on our sister site InnovationMap.

    A Rice University scientist will be working on the team for NASA's latest Mars rover. I

    NASA Mars rover Perseverance
      
    Image courtesy of NASA/JPL-Caltech
    A Rice University scientist will be working on the team for NASA's latest Mars rover. I
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    Business news

    24 Dallas-Fort Worth companies make 2025 Forbes Global 2000 list

    John Egan
    Jun 17, 2025 | 4:43 pm
    Dallas skyline with reflection
    joe daniel price/Getty Images
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    More than 60 Texas-based companies appear on Forbes’ 2025 list of the world’s 2,000 biggest publicly traded companies, and nearly half come from Dallas-Fort Worth.

    Among Texas companies whose stock is publicly traded, Spring-based ExxonMobil is the highest-ranked at No. 13 globally, followed by another Houston-based company, Chevron (No. 30 globally). Dallas-based AT&T comes in third in Texas (No. 35 globally). Rounding out Texas' top five are Austin-based Oracle (No. 66 globally), and Austin-based Tesla (No. 69 globally).

    Ranking first in the world is New York City-based J.P. Morgan Chase.

    Forbes compiled this year’s Global 2000 list using data from FactSet Research to analyze the biggest public companies based on four metrics: sales, profit, assets, and market value.

    “The annual Forbes Global 2000 list features the companies shaping today’s global markets and moving them worldwide,” said Hank Tucker, a staff writer at Forbes. “This year’s list showcases how despite a complex geopolitical landscape, globalization has continued to fuel decades of economic growth, with the world’s largest companies more than tripling in size across multiple measures in the past 20 years.”

    The U.S. topped the list with 612 companies, followed by China with 317 and Japan with 180.

    Here are the rest of the Texas-based companies in the Forbes 2000, grouped by the location of their headquarters and followed by their global ranking.

    Dallas-Fort Worth

    • Caterpillar (No. 118)
    • Charles Schwab (No. 124)
    • McKesson (No. 195)
    • D.R. Horton (No. 365)
    • Texas Instruments (No. 374)
    • Vistra Energy (No. 437)
    • CBRE (No. 582)
    • Kimberly-Clark (No. 639)
    • Tenet Healthcare (No. 691)
    • American Airlines (No. 834)
    • Southwest Airlines (No. 844)
    • Atmos Energy (No. 1,025)
    • Builders FirstSource (No. 1,039)
    • Copart (No. 1,062)
    • Fluor (No. 1,153)
    • Jacobs Solutions (1,232)
    • Globe Life (1,285)
    • AECOM (No. 1,371)
    • Lennox International (No. 1,486)
    • HF Sinclair (No. 1,532)
    • Invitation Homes (No. 1,603)
    • Celanese (No. 1,845)
    • Tyler Technologies (No. 1,942)

    Houston area

    • ConocoPhillips (No. 105)
    • Phillips 66 (No. 276)
    • SLB (No. 296)
    • EOG Resources (No. 297)
    • Occidental Petroleum (No. 302)
    • Waste Management (No. 351)
    • Kinder Morgan (No. 370)
    • Hewlett Packard Enterprise (No. 379)
    • Baker Hughes (No. 403)
    • Cheniere Energy (No. 415)
    • Corebridge Financial (No. 424)
    • Sysco (No. 448)
    • Halliburton (No. 641)
    • Targa Resources (No. 651)
    • NRG Energy (No. 667)
    • Quanta Services (No. 722)
    • CenterPoint Energy (No. 783)
    • Coterra Energy (No. 1,138)
    • Crown Castle International (No. 1,146)
    • Westlake Corp. (No. 1,199)
    • APA Corp. (No. 1,467)
    • Comfort Systems USA (No. 1,629)
    • Group 1 Automotive (No. 1,653)
    • Talen Energy (No. 1,854)
    • Prosperity Bancshares (No. 1,855)
    • NOV (No. 1,980)

    Austin area

    • Dell Technologies (No. 183)
    • Flex (No. 887)
    • Digital Realty Trust (No. 1,063)
    • CrowdStrike (No. 1,490)

    San Antonio

    • Valero Energy (No. 397)
    • Cullen/Frost Bankers (No. 1,560)

    Midland

    • Diamondback Energy (No. 471)
    • Permian Resources (No. 1,762)
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