Over one million people are estimated to travel to Istanbul each year for hair transplants.

The global xenotransplantation market may already be valued at more than $13B.

How Korea’s beauty industry is impacting its healthcare system

Hallyu, or the spread of Korean culture, has made South Korea a global leader in the beauty industry. People worldwide travel to the country, seeking aesthetic procedures like microneedling and noninvasive lifting. The $4B industry attracts many doctors seeking high profits. However, the result is a healthcare system facing a critical shortage of general practitioners and hospital physicians.

Organ transplants can come with a price tag of more than $2M without insurance

According to 2025 report data that was graphically represented by Statista, average costs for organ transplants can be as steep as $2.3M for a double lung transplant and $1.9M for a heart. These figures are based on what was actually charged to insurance companies—not what individual patients paid. Following the actual transplant there are also additional costs associated with the procedure, including lifelong immunosuppressant drugs.

Humans may have as many as 100,000 to 150,000 individual hairs on our scalps, growing at a rate of roughly 1 centimeter per month.

The first coffeehouse opened in Constantinople

Coffeehouses began opening in modern-day Istanbul sometime in the 1500s. These cafes quickly became invaluable spaces for gathering and exchanging news and ideas.

In 2024, the US had more organ transplants than ever before—besting the 2023 record

More than 48,000 organ transplants were performed in 2024, and about 46,630 were performed in 2023. These record highs are illustrated here as part of data from 1988 to partway through 2025. Kidneys, livers, and the heart remain the most common transplanted organs. (Some users may encounter a paywall.)

Telogen effluvium is a common, temporary type of hair loss that can be triggered by severe stress, illness, or other body changes like childbirth—it pushes as much as 70% of hair into its resting phase, causing hair to fall out.

Late-stage clinical trials indicate that a common arthritis drug may be a promising treatment for a leading cause of hair loss.

Cross-species transplantation has been attempted in medicine for more than 300 years.

40% of women will have noticeable hair loss by age 50.

Transplant organs don't always last a lifetime—that's where retransplants come in

How long a transplanted organ lasts depends on a variety of factors including the type of organ and the health of the recipient. Sometimes organs can last many decades, but other times people may need retransplants, which means another transplant following a previous one. Retransplants are most common with kidneys.

Real-time tracking of individual hair cells has revealed that hairs don't actually get pushed out from the root—instead, hair cells are tugged upward by surrounding tissues that act like tiny motors.

What conditions can be treated with stem cells?

Stem cell research is a global enterprise, and much of the work is being done in Europe. This page gives readers a good sense of the medical conditions stem cell researchers in Europe focus on, and the specific research challenges they address. This page also offers links to in-depth information about many of the research projects.

Testosterone prescriptions remain very low overall

Though demand for an injectable formulation of testosterone roughly doubled between 2019 and 2025, testosterone prescriptions still remain very uncommon—adding up to less than 2 per 100,000 prescriptions in 2025.

Cleopatra purportedly recommended grinding up fly heads and rubbing them on areas experiencing hair loss as a treatment.

Laser procedures have made tattoo removal much more common

An increasing number of Americans, including high-profile celebrities, get tattoos removed because laser removal has become more advanced and cost-effective. The tattoo industry is adjusting to this mainstream trend.

Trauma-related amputations are primarily from falls, then car accidents and related traumas, followed by mechanical forces according to analysis based on global burden of disease data in 2017.

Every Thanksgiving, Americans eat over 40 million turkeys

That's 50% of all whole turkeys sold in the US in a given year. (Most of the remaining 50% are purchased for Christmas.)

About 250,000 patients accessed assisted reproductive technologies in 2022

In 2022, 251,542 patients tried assisted reproductive technologies—most commonly IVF—resulting in more than 98,000 infants. Those children represent around 2.6% of the babies born in the US.

Mapping projected food inflation across the world in 2026

Iran tops the list of hardest-hit countries with a projected 56% inflation on food prices in 2026, followed by Argentina (33%) and Turkey (25%). In the opposite direction is Niger, whose food inflation is expected to drop 18% as a result of strong harvests and financial stabilization. The global average of food inflation is expected to be 3%.

Explore different pig-to-human xenotransplantation possibilities, including using pig pancreatic cells for treating diabetes.

Pig-to-human transplant work has raised concerns about donor pigs' living conditions.

Christmas trees are a $6B global industry

In the US, the real tree industry is valued at $2B, the reflection of nearly 30 million trees sold annually at an average profit of about $10 per tree. While each tree takes about 8 years to mature, their artificial counterparts can be made much more quickly, mostly in China, valued at over $1B as of 2020.

Transplanted organs can be rejected by the body immediately, months after transplant, or slowly over years

Organ rejection remains a huge challenge for organ transplant recipients. Rejection occurs when a recipient's immune system identifies a transplanted organ as foreign and attacks it. Recipient-donor screening processes try to match antigens to help reduce this risk.

Pigs are of particular interest for xenotransplantation because they are close to human size, are easily raised in captivity, and have large litters.

How heart transplants work

Heart transplants require an old heart to be removed and a new one to be installed without killing the patient. How does that work? In this easy-to-understand five-minute video, learn each step of the intricate process, from donor matching to the preservative solution a heart is doused in while it is transported.

It's been about 30 years since a new hair loss drug was approved in the US, and women currently have no approved pills for hair loss.

Americans consume 8.3 billion calories of turkey on Thanksgiving

Individuals consume an average of 3,150 to 4,500 calories at the meal, which takes the average male 10 hours to burn off.

After the owner fell into a Ponzi scheme, one braiding shop in suburban Maryland began making $130K a day by staying open for 24-hours

Because braiding often takes a long time, the salon prioritizes fast, efficient styles, with two braiders often working together on a client, which increases revenue by increasing turnover. The salon has 120 seats and more than 400 contracted braiders across its 10,000-square-foot space.

A clinical trial is underway in 2026 to help kidney transplant recipients avoid a lifetime of immunosuppressing drugs

This later-stage clinical trial, in Chicago and Taiwan, evaluates the efficacy and safety of a new cellular therapy that may be swapped in for immunosuppressing drugs among kidney transplant recipients. The study randomizes people to either receive standard immunosuppressants or this cellular therapy and fewer immunosuppressants. It only includes kidney transplant recipients receiving organs from live donors so transplant surgery timing won't hinge on the unpredictable schedule of performing surgery and follow-up care when a donor dies.

Trump's H-1B fee hike could reshape US industries and global talent flows

Analysts warn the new H-1B fee could trigger labor shortages in tech, medicine, and universities; push firms to offshore more work; and drive skilled Indian workers and students toward other countries—weakening America's innovation edge.

How long it takes to travel by train from various cities

This interactive allows users to see how long it would take to move from one city to another in Europe via trains.

Civilians on short-term spaceflights can experience long-term astronaut health impacts

A collection of 44 studies—primarily based on data from a 2021 tourist trip to low Earth orbit—identified immune system disruption and some kidney damage in tourists, with women appearing to recover from space travel faster than men. Return trips from Mars may require human travelers to be on dialysis.

How much your blood really costs

In the US, donating plasma twice a week can earn you $400 a month. But this system only works by targeting people who need the money most. Plasma clinics are placed in low-income zip codes, and frequent donation may increase health risks.

3 US maps illustrate transplants, donors, and organ waitlist additions—by state.

Humanity's reduced body hair slows down wound healing

Cuts to human skin take twice as long to heal compared to chimps and other mammals. Scientists argue this is due to the reduced number of hair follicles on human bodies. Hair follicles contain stem cells which help repair skin cells faster, so as humanity shed its hair over time, so to speak, it also slowed its wound healing.

The first successful organ transplant was performed in 1954

The successful kidney transplant procedure, at what's now-called Brigham and and Women's Hospital, ushered in a new medical era and gave hope to patients with organ failure. The recipient, 23-year-old Richard Herrick, lived eight more years after receiving the donated organ from his living twin brother, Ronald.

Gender-affirming hormone therapy cues changes similar to puberty

When HRT is part of gender affirmation care, people receive regular doses of estrogen or testosterone to alter hormone levels to more closely align with those of cis individuals of that biological sex. HRT may affect voice pitch, body hair, bone density, and more. Many of those changes are not reversible with the cessation of therapy, though the effects may diminish.

So-called 'recession blondes and brunettes' skip hair appointments to save money

One hairstyle trend is seen as a recession indicator: people letting their hair grow darker roots instead of frequently splurging on expensive blonde highlights.

Immunosuppressants enable organ transplants, but come with severe side effects

This drug cocktail helps to lower your body's natural response to attack a transplanted organ. Such medications usually need to be taken for a lifetime after receiving an organ and can come with serious side effects including high blood pressure, diabetes, increased risk of some cancers, and high cholesterol, among others.

Visualizing Byzantium in the year 1200

This is a computer reconstruction of the Byzantine capital at its apogee, just before the Fourth Crusade. Alongside detailed renderings of the Hippodrome and Hagia Sophia, it includes dozens of the imperial city’s less famous monuments, many of which can still be found in modern Istanbul. The reconstruction is a work in progress, and the Byzantium 1200 X account routinely posts updates.

Xenotransplants are an experimental last resort for the terminally ill when they cannot or will not receive a human organ.

Why Friday surgeries are (likely) riskier

Scheduling surgery on a Friday may lead to more complications—up to 5% more often—compared to surgeries performed after the weekend. The research was conducted by a team from the United States and Canada and analyzed data from over 450,000 patients who underwent common surgeries in Ontario between 2007 and 2019. Check out their findings here.

Listen to why thousands of donated human kidneys are thrown away annually, even as thousands of people are awaiting a kidney transplant.

Artificial Christmas trees can range from about $85 to $1K or more

In 2022, 22.34 million real Christmas trees were purchased and sold at a median price of $80. Even so, from a price standpoint, a fake tree is usually the less expensive option in the long run, as they're reusable and can save time and maintenance.

Scientific advances are unlocking a wide range of alternatives to IVF

From refined artificial insemination and microsurgical sperm extraction to experimental uterine transplants, scientific innovation is rapidly advancing potential fertilization technologies. But they come along with costly trials, some ethical dilemmas, regulatory issues, and more.

Early 20th-century ID cards protected transgender people in Germany using hormone therapy.

Follow an IVF procedure from lab to transplant

What happens once eggs are harvested from an ovary? How does an embryo form within a petri dish? This detailed video offers a glimpse of the transformations eggs experience as women age, and how sperm are injected into eggs in some forms of IVF treatment.

Women tend to tip more often than men

For instance, among people who visit hair salons or barber shops, 62% of female respondents said they always tipped. Only 45% of men said the same. This article includes more takeaways and stats about how Americans tip, and who receives them.

The most expensive EU countries

Among countries in the European Union, Luxembourg has the highest prices (52% higher than the EU average). Romania seems like it's the cheapest option in the EU at 46% below the EU average. Want to see how other countries such as Italy, France and Germany rank? Explore this color-coded map to learn more.