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Sara García-Alonso: the astronaut bringing science down to earth

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Sara García-Alonso is redefining what it means to be a scientist in the public eye. As an ESA astronaut candidate and cancer researcher, she balances hard science with storytelling that inspires. Whether she’s floating in microgravity, giving talks at universities, or sharing personal reflections, she makes space and science feel closer than ever. Her content isn’t just educational, it’s empowering.

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1. Who she is

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Sara García-Alonso is a PhD researcher and the first Spanish woman selected as an astronaut candidate for the European Space Agency. Her career bridges two demanding worlds: advanced cancer research and astronaut training. She has published in high-impact journals, conducted parabolic flight experiments, and now trains at ESA facilities for future space missions. Beyond her technical achievements, she positions herself as a communicator, turning complex concepts into narratives people can connect with. From cancer biology to microgravity, Sara’s journey makes her one of the most visible faces of Spanish science today.

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2. A network of heavyweights

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Sara’s network spans across institutions and media with real influence. She collaborates with ESA, top Spanish universities, and global research centers like DLR. She’s also featured in outlets like El País, Penguin Random House, Glamour, and Cadena SER, blending academic credibility with mainstream cultural presence. This duality allows her to reach both professional scientists and the general public.

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3. Why people listen

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Sara communicates with a mix of passion and clarity. She doesn’t lecture. She invites curiosity, asking questions, telling stories, and even laughing at the challenges of astronaut training. Her videos about fear, health, and science resonate because they are personal and direct. She isn’t afraid to show vulnerability, which makes her relatable in a field often seen as untouchable.

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4. Authenticity that resonates

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With an Authenticity Score of 97.5/100, Sara embodies the balance of authority and relatability. She shares behind-the-scenes photos of astronaut training, skydiving adventures, and thoughtful reflections on success and failure. Posts that could easily feel distant instead feel intimate, whether she’s in an ESA suit or at home. That mix of big-stage science and everyday openness is what keeps her community engaged.

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5. Numbers that back it up

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Her following has skyrocketed from 38K to over 102K in just 18 months, with steady growth tied to major milestones like astronaut selection and ESA media coverage. On LinkedIn, she ranks #5 in Spain overall and sits in the Top 70 globally in Astronomy & Physics. Engagement is consistently strong, with posts often surpassing 200K–700K views and thousands of reactions. These metrics prove her influence is both niche and wide-reaching.

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6. Collaborations that matter

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Sara partners with major institutions including ESA, Spanish universities, and media outlets that amplify her story. She has featured in leading Spanish press, worked with cultural platforms like Penguin, and taken part in science outreach programs that bridge STEM with society. These collaborations highlight her role as both scientist and cultural figure.

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7. Why brands should partner with her

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Working with Sara means tapping into the rare blend of science, culture, and inspiration. She offers authority, creativity, and credibility that brands can align with.

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• Thought leadership campaigns in STEM education and science communication.
• Speaking engagements at universities, conferences, or brand summits.
• Co-created video content about innovation, health, or space exploration.
• Collaborations with publishing, media, or education platforms to inspire new audiences.

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8. What causes she defend

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Sara García-Alonso is a passionate advocate for women in STEM. She uses her platform to highlight the importance of gender representation in science, regularly celebrating milestones for women in research and space. Through her posts and media presence, she encourages young women to pursue technical careers, showing that ambition in STEM is not only possible but necessary.

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9. Why she's relevant in 2025

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In a world fascinated by space exploration and urgently in need of scientific literacy, Sara’s relevance is undeniable. She represents the new face of science communication: credible, approachable, and global. As AI, biotech, and space research reshape industries, voices like hers help bridge the gap between labs, institutions, and everyday people.

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Conclusion: Reaching for the stars

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Sara García-Alonso is more than an astronaut candidate. She’s a symbol of what science can look like in the 21st century. She inspires by showing the human side of research and exploration, proving that curiosity, resilience, and openness can take you far. Whether on Earth or beyond, her influence will keep growing, guiding others to aim higher and dream bigger.

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