Unraveling Azoospermia: Using Genetics to Avoid Futile Sperm Extraction

When we imagine research linked to space travel, we often picture rockets, astronauts, and the silence of orbit. Yet some of the most important insights into life beyond Earth happen far from space, in quiet rooms where people lie still for weeks at a time. These are bed rest studies, a unique research model that simulates the effects of microgravity on the human body by asking participants to remain lying down for long periods. While these studies are designed to explore muscles, bones, and metabolism, they also create an unusual social world. What happens to human relationships when movement is restricted, routines are stripped away, and the experience of time changes?

For many couples struggling to conceive, a male infertility diagnosis can feel like a closed door. Roughly half of all infertility cases worldwide stem from male factors, and among these, one of the most frustrating conditions is non-obstructive azoospermia (or NOA for short), a complete absence of sperm caused not by a physical blockage but by a failure of sperm production itself. Until recently, most men with NOA were offered a potentially painful and uncertain procedure called testicular sperm extraction (or TESE). In this surgery, doctors search directly within the testis for a few viable sperm cells that can be used for in vitro fertilization. When successful, the results can be life-changing. When unsuccessful, it is physically invasive, emotionally draining, and often repeated several times in vain.

Hydrogen is often presented as one of the most promising tools we have for cutting carbon emissions, especially in parts of the economy where clean alternatives are limited. Heavy industry, long-distance transport, and chemical manufacturing all need large amounts of energy that cannot easily be supplied by batteries alone. Green hydrogen, produced using renewable electricity, could fill that gap. Governments are investing billions to make this happen, but there is a catch. The technology depends on rare materials that could become a bottleneck just as demand takes off. New research led by Jonathan Ruiz Esquius, and conducted by chemist Sara Riera, at the Carbon Science and Technology Institute in Spain, shows how smarter catalyst design could help remove that barrier.

You may imagine your vasculature as a vast and silent network of tubes, dutifully carrying blood, oxygen, and nutrients to every organ and tissue. These vessels seem purely mechanical, like plumbing hidden behind walls, doing their job quietly and invisibly. Yet modern biology has revealed a far richer and more surprising reality. Blood vessels are lined with living, sensing, responding cells called endothelial cells, and these cells are anything but passive. They listen to chemical signals, respond to stress, regulate traffic, and communicate constantly with the immune system.

Tuberculosis remains one of the world’s oldest and most stubborn infectious diseases, yet the way health systems respond to it is often dogged by modern challenges. Clinics are overcrowded, families must travel long distances, and children with vague or non-specific symptoms are frequently overlooked. For decades, tuberculosis care has been organised around hospitals and specialised facilities, even though the disease itself spreads and takes root in homes and communities. A growing body of research now argues that this mismatch is costing lives, particularly among children. Decentralised models of care, which bring services closer to families and empower community-based health workers, offer a compelling alternative. Recent evidence from multiple settings shows that when tuberculosis care is shifted out of distant clinics and into neighbourhoods and households, access expands with potential to close the current gaps in TB detection, treatment outcomes and prevention that benefit communities and families, including their children.

If you ask someone in the United States whether to reconsider their health insurance plan choices, they may sigh, roll their eyes, and offer a story about navigating a maze of deductibles, networks, and confusing brochures. In practice, most people end up doing the simplest thing possible: they stay in the same plan they are already in. Economists have long noticed this pattern. Even when plans raise their prices or competitors offer better deals, people tend to remain where they are. This raises a fascinating question: do people stay because switching is difficult, or because they genuinely prefer the plan they already have? A new study by the economist Prof. Ariel Pakes of Harvard University, and colleagues Prof. Mark Shepard and Prof. Jack Porter, digs into this puzzle and uncovers some surprising answers. Although the study uses sophisticated mathematical tools, the insights are straightforward and important for anyone interested in how health insurance markets work.

If you were to observe a quiet Dutch pasture, you might not guess that one of the most important climate-resilience workers in the landscape is silently engineering the soil beneath the grass. However, just below your feet, an unassuming creature plays a role in buffering floods, preserving crops during droughts, and quietly maintaining the natural plumbing system of the land. This creature is the humble deep-burrowing earthworm, Lumbricus terrestris (or L. terrestris for short). In recent years, researcher Roos van de Logt of the Louis Bolk Institute, and colleagues, have been uncovering the surprisingly complex story of this earthworm. Their findings suggest that supporting, and in some cases reintroducing, L. terrestris could be a powerful, nature-based tool for helping European grasslands adapt to intensifying climate extremes.

As the practice of psychotherapy increasingly embraces the spiritual dimensions of the human experience, therapists are investigating new ways to weave faith and meaning into healing. Dr Suzanne Coyle, a licensed pastoral counsellor and family therapist, explores the role of spirituality in psychotherapy and how this intersection can support the journey of healing. Her work provides practitioners with the tools and knowledge to meaningfully integrate spirituality into clinical practice.

Africa is often described as a continent of extremes. Vast deserts give way to lush rainforests; humid coastlines sit beside high, cool plateaus; ancient savannas stretch for thousands of kilometers. Life in Africa has always existed at the edge of change, shaped by heat and drought, abundance and scarcity. Survival here has never been guaranteed, it has had to be earned, generation by generation, through adaptation. Nowhere is this long story of adjustment and resilience written more clearly than in DNA.

Researchers Maryam Doroudian and Jürgen Gailer from the University of Calgary explore what happens when red blood cells rupture and release a zinc-containing enzyme called carbonic anhydrase 1 into the bloodstream, revealing that it remains unexpectedly free and may influence vascular health. Their work also connects to broader research showing how liquid chromatography is transforming our ability to study toxic cadmium and mercury as they move through the body. Together, these studies uncover hidden biochemical processes that shape how environmental pollutants and blood-cell damage affect human health.