The Spaceflight101 Blog

The Problem With Thinking That Science Has to Be Immediately Useful to Be Worthwhile By Dr. Nadia Kovac In space medicine, we get a question that says more about the asker than the answer: “What’s the point of studying that if it doesn’t help us right now?” It’s a fair question, born from a world…

Image: Pexels I still remember the first time I watched a plant grow in microgravity. It was a tiny Arabidopsis seedling, twisting in its growth chamber aboard the International Space Station. The roots had no idea which way to go. Without gravity’s steady tug, they spiraled and looped, searching for a signal that simply wasn’t…

I still remember the first time I watched a plant grow in a clinostat. It was a messy, spiraling affair—roots searching for gravity that wasn’t there, shoots bending in confusion. A colleague walked by, glanced at the setup, and asked the question I’ve now heard a hundred times: “But how does this help us get…

In space medicine, I bump into a quiet but stubborn pressure all the time: the demand for immediate, tangible results. When we study how the human body adapts to microgravity, someone always asks, “But how does this help patients on Earth?” It’s a fair question. But it smuggles in an assumption—that a scientific question is…

In the summer of 1973, three men aboard Skylab pulled on pneumatic cuffs just below their thighs and inflated them to 60 millimeters of mercury. The cuffs were not medical treatment. They were a physiological interrogation—a deliberate attempt to simulate, in orbit, the venous compression that gravity normally provides on the ground. The experiment was…

When we talk about space medicine, the cardiovascular system usually takes center stage—and honestly, it should. The heart and blood vessels are so finely tuned to Earth’s gravity that when that steady pull vanishes, the body starts remodeling itself almost immediately. I’m Dr. Nadia Kovac, and after years of watching how humans adapt to extreme…

I’ve spent my career staring at the human heart—first in a terrestrial hospital, then through the telemetry streams of astronauts floating above the Earth. And I can tell you, the most unsettling thing about space isn’t the silence or the blackness. It’s watching a perfectly healthy cardiovascular system begin to remodel itself within 48 hours…

I’ll admit it: mention protein crystallization at a dinner party and you’re likely to get a polite, slightly glazed look. It sounds like the kind of thing that belongs in an orbital lab, a niche obsession for astronauts in blue jumpsuits. But here’s the quiet truth. The same molecular choreography that builds flawless crystals in…

When I tell people I spend my days coaxing proteins into forming perfect crystals, I usually get a polite, blank stare. It sounds esoteric, maybe even a little boring—like watching a stalactite grow. The mental image is a dusty lab bench, a microscope, and something that looks like a tiny grain of salt. But that…

I still remember the first time I watched a lysozyme crystal nucleate under simulated microgravity. It wasn’t aboard the ISS or some gleaming orbital lab—just a modest magnetic levitation rig in a cluttered university basement. The crystal emerged slowly, almost tentatively, its facets sharp and clean, bending the light into a tiny rainbow. I stood…