FLASHCARDS! How You Can Reduce AI Energy Use
Math! Science! History!
In this Earth Day week special of Flashcards Friday, we explore the growing environmental impact of artificial intelligence and digital technology. While AI is revolutionizing our world, it comes with a hidden cost, massive energy consumption and increasing strain on our planet. In this episode, you’ll learn how data centers contribute to global electricity use, how your everyday digital habits add to the problem, and most importantly, what you can do to help curb energy consumption. From holding tech companies accountable to making smarter personal choices, this episode empowers you to take...
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How AI Quietly Drives Climate Change
Math! Science! History!
In this Earth Day episode, I pull back the curtain on the hidden environmental cost of our digital lives. From streaming videos and sending emails to the explosive growth of artificial intelligence, I explore how the internet, often perceived as clean and intangible, is powered by massive, energy-hungry infrastructure that relies heavily on fossil fuels. I walk through the surprising math behind data centers, AI energy consumption, and e-waste, while challenging the narrative that tech is inherently sustainable. This episode isn’t about guilt, it’s about awareness, accountability, and...
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MOMENTUM! Earth Day and Common Ground
Math! Science! History!
In this Earth Day Week episode, I explore how momentum, whether in social movements, politics, or personal relationships, starts with communication, not agreement. Drawing from the origins of the first Earth Day, I highlight how bipartisan collaboration sparked a movement that engaged 20 million Americans. You’ll learn how structured dialogue reduces polarization, why understanding values is the real bridge to empathy, and how consistent communication builds trust and momentum over time. This episode reveals the math of common ground and how two perspectives together solve complex...
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FLASHCARDS! How to Leave a Legacy
Math! Science! History!
Today’s episode explores how you can intentionally build a meaningful legacy by learning from Rosalind Franklin, the scientist whose meticulous work uncovered the DNA double helix. Listeners will discover why precision and patience are essential in creating lasting impact, how to stay motivated when recognition is delayed, and how legacy is less about immediate fame and more about what you enable others to achieve. Tune in to gain practical insights on crafting a legacy that endures beyond your lifetime. Three Takeaways! Why Precision and Patience Matter: How careful, thoughtful...
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Rosalind Franklin: The Half-Life of Recognition
Math! Science! History!
What happens when the person who does the most essential work never gets the credit? In this episode of Math, Science, History, I tell the story of Rosalind Franklin, the brilliant, exacting chemist whose X-ray diffraction image, Photo 51, revealed the double helix structure of DNA. From the basement of King's College London to the Nobel Prize ceremony she never attended, this episode traces how recognition fades, gets redistributed, and sometimes takes seventy years to settle. It's a story about science, yes, but also about who gets to be remembered, and why the quiet ones doing the actual...
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MOMENTUM! How to Stop Paying the Hidden Brain Tax
Math! Science! History!
In this episode of Monday Momentum, I tackle the silent force that stalls your week before it even starts: overthinking. Drawing on groundbreaking cognitive research, including a Princeton study that found financial stress can drop mental performance by the equivalent of a 13-point IQ loss, and Bluma Zeigarnik's landmark 1927 findings on unfinished tasks, I reveal why mental drag is the hidden tax on your time, focus, and forward motion. More importantly, I shows you exactly how to break the loop: because momentum doesn't begin with perfect clarity, it begins with initiation. Even five minutes...
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FLASHCARDS! Beat Tax Anxiety: Cognitive Tips to Reduce Stress
Math! Science! History!
Tax season can feel overwhelming, even for people who enjoy working with numbers. In this Flashcards Friday episode, Gabrielle breaks down the science behind why taxes trigger stress and offers three practical, math-inspired strategies to make the process more manageable. By understanding how your brain processes complexity and anxiety, you can approach taxes with clarity, structure, and a stronger sense of control. What You’ll Learn How working memory overload contributes to tax season overwhelm, and how to reduce it A simple Bayesian-style approach to managing financial anxiety with...
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The History of Taxes: From Ancient Civilizations to Modern Income Tax
Math! Science! History!
Taxes feel like a modern invention, tied to governments, elections, and April deadlines, but their story stretches back over five thousand years. In this episode of Math! Science! History!, Gabrielle traces the origins of taxation from ancient Mesopotamian clay tablets and Egyptian grain levies to Roman tax farmers, medieval tithes, and the birth of the modern income tax. Along the way, she explores how taxation has always been more than economics, it is a reflection of power, fairness, and the cost of belonging to a society. What You’ll Learn How taxation began in ancient Mesopotamia as...
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MOMENTUM! Move Forward with Mentorship!
Math! Science! History!
In this week’s Monday Momentum, I explore how mentorship creates forward motion in both your career and your life. Inspired by the Maria Gaetana Agnesi episode, I discuss how seeking guidance and giving guidance in parallel acts like a flywheel, building momentum that carries projects, learning, and personal growth forward. I share actionable tips for finding a mentor, mentoring others, and observing the momentum that emerges when support flows in both directions. Resources & Research: Less than half of professionals report having a mentor, yet those with mentors are much more likely to...
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FLASHCARDS! Six Gates of Access: Why Resources Exist But Women Can't Reach Them
Math! Science! History!
In this episode of Flashcards Friday, I break down a powerful diagnostic framework, the Six Gates of Access, that reveals why resources like healthcare, education, legal help, and business funding can exist on paper while remaining completely out of reach for millions of women. Moving far beyond the question of whether help exists, I map each gate, Awareness, Eligibility, Friction, Capacity, Continuity, and Safety, across four real-world scenarios: maternal health, advanced education, entrepreneurship, and workplace discrimination, giving listeners a practical tool to identify exactly which...
info_outlineShe looked at starlight and said, I can organize that, and then she did! For Women's History Month, host Gabrielle Birchak profiles Annie Jump Cannon (1863–1941), the American astronomer who took a chaotic universe and filed it into something the world could actually study. Cannon was one of the Harvard Computers, a group of women hired at Harvard College Observatory to analyze photographic glass plates of the night sky, and she became the fastest, most prolific stellar classifier in history. Over her lifetime, she manually classified over 350,000 stars, more than any person before or since.
In this episode, Gabrielle breaks down the Harvard Spectral Classification System, OBAFGKM, the sequence Cannon refined and that astronomers worldwide still use today. You'll learn what each letter means, what colors and temperatures they represent, where our own sun sits in the sequence (spoiler: it's a G2 star), and why Cannon's seemingly quiet classification work was actually one of the most powerful scientific acts of the early twentieth century. Classification, Gabrielle argues, isn't boring, it's the infrastructure that turned starlight into data and beautiful objects into the science of astrophysics.
This episode also reflects on the human side of Cannon's story: the fact that she was nearly deaf for most of her career, that she was a suffragist, that she produced one of the most monumental data catalogs in scientific history, the nine-volume Henry Draper Catalogue, and that despite her extraordinary achievements, her system was named the Harvard Classification System, not the Cannon System. Her work endured. Her system stayed. That's the real legacy.
Key Topics Covered:
- Who Annie Jump Cannon was and why she matters for Women's History Month
- The Harvard Computers and their role at Harvard College Observatory
- The OBAFGKM stellar spectral classification sequence, explained color by color and temperature by temperature
- The Henry Draper Catalogue: 225,300 stars classified across nine volumes, 1918–1924
- Why classification isn't clerical work, it's the foundation of science
- Cannon's recognition, awards, and the Annie Jump Cannon Award, still given annually by the American Astronomical Society
FEMINIST MNEMONIC (GABRIELLE'S VERSION)
Obviously Bold, A Feminist Generation Keeps Marching. O – B – A – F – G – K – M
RESOURCES & LINKS
About Annie Jump Cannon
Annie Jump Cannon Biography, National Women's History Museum
Annie Jump Cannon: Star Classifier, Sky & Telescope
The Harvard Computers
Project PHaEDRA: Transcribing the Work of the Harvard Computers, Smithsonian Digital Volunteers
The Henry Draper Catalogue
The Henry Draper Catalogue, Internet Archive (original volumes, free)
Stellar Classification
The Annie Jump Cannon Award
Annie Jump Cannon Award in Astronomy, American Astronomical Society
2025 Recipient: Maya Fishbach (University of Toronto), gravitational-wave astrophysics & cosmology
2024 Recipient: Jennifer Bergner (UC Berkeley), astrochemistry and planetary formation
Recommended Reading
The Glass Universe: How the Ladies of the Harvard Observatory Took the Measure of the Stars by Dava Sobel, Penguin Random House | Amazon
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