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Which forest region receives less annual rainfall than many parts of the Sahara Desert?

Antarctica's Dry Valleys

The Amazon Rainforest

Interior boreal forests of Alaska and Siberia

The Black Forest of Germany

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Did You Know? 12 Strange Medical Practices from History

Did You Know? 12 Strange Medical Practices from History

⏱️ 6 min read

Throughout history, physicians and healers have employed methods that seem shocking, bizarre, and often dangerous by modern standards. Before the advent of scientific medicine, medical practitioners relied on theories and practices that ranged from the misguided to the downright bizarre. These treatments, once considered cutting-edge medical care, reveal how far medicine has evolved and remind us that today's standard practices may someday seem equally peculiar to future generations.

Ancient and Medieval Medical Oddities

1. Bloodletting for Nearly Every Ailment

For over two thousand years, bloodletting remained one of the most common medical procedures across multiple civilizations. Physicians believed that illness resulted from an imbalance of bodily fluids, or "humors," and that removing excess blood could restore health. Doctors used lancets, leeches, or specialized cups to drain blood from patients suffering from conditions ranging from fevers to headaches to mental illness. This practice persisted well into the 19th century and may have contributed to George Washington's death in 1799, when physicians drained nearly half of his blood volume while treating a throat infection.

2. Trepanation: Drilling Holes into Skulls

Among the oldest surgical procedures known to humanity, trepanation involved drilling, cutting, or scraping holes into the human skull. Archaeological evidence shows this practice dates back at least 7,000 years. Ancient practitioners performed trepanation to treat head injuries, seizures, and mental disorders, believing it would release evil spirits or relieve pressure. Surprisingly, many patients survived these procedures, as evidenced by skulls showing bone regrowth around the holes, indicating healing occurred after surgery.

3. Mercury as a Miracle Cure

For centuries, mercury was prescribed for treating syphilis, constipation, depression, and parasitic infections. Physicians administered this toxic heavy metal in various forms: as pills, ointments, or even vapor inhalations. The treatment often proved worse than the disease itself, causing mercury poisoning that resulted in tooth loss, kidney failure, and neurological damage. The phrase "mad as a hatter" originated from hat makers who suffered brain damage from mercury exposure used in felt production. Despite its dangers, mercury remained in medical use until the early 20th century.

4. Tobacco Smoke Enemas for Drowning Victims

In the 18th and early 19th centuries, medical practitioners believed that blowing tobacco smoke into a patient's rectum could resuscitate drowning victims. Resuscitation kits containing bellows and tubes for this purpose were stationed along major waterways, including the River Thames in London. Physicians theorized that the tobacco smoke would warm the patient and stimulate respiration. This practice continued until researchers discovered that tobacco was actually harmful and ineffective for resuscitation purposes.

Questionable Renaissance and Early Modern Treatments

5. Mummy Powder as Medicine

During the Renaissance period, ground-up Egyptian mummies became a sought-after pharmaceutical ingredient across Europe. Physicians prescribed "mummia" to treat everything from bruises and fractures to stomach ailments and plague. The demand became so high that it led to widespread grave robbing and even the creation of fake mummies. This macabre practice continued until the 18th century when the medical community finally questioned both the ethics and efficacy of consuming human remains.

6. Urine as Diagnostic Tool and Treatment

Medieval physicians practiced uroscopy, an elaborate diagnostic system based on examining the color, smell, consistency, and even taste of patient urine. Doctors claimed they could diagnose virtually any disease through urine analysis alone, sometimes without even examining the patient directly. Beyond diagnosis, urine was also used as a treatment—physicians prescribed drinking one's own urine or applying it topically to treat wounds, skin conditions, and toothaches. While modern urinalysis does provide valuable diagnostic information, historical uroscopy relied more on superstition than science.

7. Arsenic for a Healthy Complexion

During the Victorian era, arsenic-containing compounds were marketed as cosmetics and health tonics. Women consumed arsenic wafers to achieve a fashionably pale complexion and clear skin, while men took arsenic-laced tonics claiming to boost vitality and stamina. Despite widespread knowledge that arsenic was poisonous, manufacturers claimed their carefully measured doses were safe. These products caused numerous deaths and chronic health problems before eventually being banned in the early 20th century.

8. Lobotomies for Mental Illness

In the 1930s through 1950s, lobotomy became a popular treatment for mental illness, mood disorders, and even chronic pain. This procedure involved severing connections in the brain's prefrontal cortex, either through drilling holes in the skull or inserting an ice-pick-like instrument through the eye socket. Portuguese physician António Egas Moniz won the Nobel Prize in 1949 for developing this procedure. However, lobotomies often left patients in vegetative states or with severe personality changes, and the practice was largely abandoned by the 1960s as psychiatric medications became available.

Unusual Animal and Organic Remedies

9. Medicinal Leeches for Everything

While leeches do have limited legitimate medical applications today, historical physicians used them excessively for nearly every conceivable ailment. Beyond simple bloodletting, leeches were applied to specific body parts to treat local inflammation, headaches, hemorrhoids, and even mental illness. The demand for medicinal leeches in 19th-century Europe was so enormous that certain species nearly faced extinction. France alone imported over 40 million leeches annually during the peak of their medical use.

10. Theriac: The Ancient Cure-All

Theriac was an ancient medicinal compound that originated in ancient Greece and remained popular through the 18th century. This supposed universal antidote contained up to 70 ingredients, including viper flesh, opium, honey, wine, and various herbs. Originally developed as protection against poison, theriac was eventually prescribed for virtually every disease imaginable. The preparation process was elaborate and required aging the mixture for years. Despite its prestigious reputation and astronomical cost, theriac had little actual medicinal value beyond the opium it contained.

11. Crocodile Dung as Contraception

Ancient Egyptian medical papyri describe using crocodile dung mixed with honey as a contraceptive pessary. Egyptian women believed this mixture, inserted vaginally, would prevent pregnancy. While utterly lacking in actual contraceptive properties, the acidic nature of dung may have provided some limited spermicidal effect, though at considerable risk of infection. Various other ancient cultures employed similarly bizarre contraceptive methods involving animal feces, demonstrating humanity's long history of seeking birth control through questionable means.

12. Radium Water for Vitality

In the early 20th century, following Marie Curie's discovery of radium, radioactive products flooded the market as miracle cures. Manufacturers sold radium-laced water, chocolate, and cosmetics, claiming they would boost energy, enhance vitality, and cure diseases. Wealthy industrialist Eben Byers famously consumed nearly 1,400 bottles of "Radithor," a radium-containing tonic, which ultimately led to his horrific death from radiation poisoning in 1932. His jaw literally disintegrated before his death. This tragedy finally prompted government regulation of radioactive consumer products.

Lessons from Medical History

These twelve strange medical practices demonstrate the dramatic evolution of healthcare from superstition-based treatments to evidence-based medicine. While these historical methods appear absurd today, they reflected the limited scientific understanding of their times. Many practitioners genuinely believed they were helping their patients, working within the theoretical frameworks available to them. This historical perspective serves as both a reminder of medical progress and a cautionary tale about accepting treatments without rigorous scientific validation. As medical science continues advancing, today's standard treatments will likely seem equally primitive to future generations, emphasizing the importance of continued research, skepticism, and the ongoing refinement of medical knowledge.

Did You Know Mount Everest Is Growing Every Year?

Did You Know Mount Everest Is Growing Every Year?

⏱️ 5 min read

Standing at 8,849 meters (29,032 feet) above sea level, Mount Everest holds the title of the world's tallest mountain. However, what many people don't realize is that this massive peak isn't static—it's actually growing taller every single year. This fascinating geological phenomenon results from powerful forces deep within the Earth's crust that have been shaping our planet's landscape for millions of years and continue to do so today.

The Tectonic Forces Behind Everest's Growth

Mount Everest's ongoing height increase is primarily attributed to the collision between two massive tectonic plates: the Indian Plate and the Eurasian Plate. Approximately 40 to 50 million years ago, the Indian subcontinent, which was once an island, began moving northward and colliding with the Eurasian landmass. This monumental collision gave birth to the entire Himalayan mountain range, including Mount Everest.

The Indian Plate continues to push northward into the Eurasian Plate at a rate of approximately 5 centimeters (2 inches) per year. This constant pressure causes the land to buckle and fold upward, resulting in the gradual but persistent elevation of the Himalayan peaks. Unlike volcanic mountains that grow through eruptions, Everest's growth is a result of this continuous tectonic compression, making it a living example of plate tectonics in action.

How Much Does Everest Grow Annually?

Scientific measurements indicate that Mount Everest grows approximately 4 millimeters (0.16 inches) per year on average. While this might seem insignificant in human terms, over geological timescales, this growth rate is remarkably substantial. Over a century, this accumulation amounts to roughly 40 centimeters (15.7 inches), and over a millennium, the mountain gains approximately 4 meters (13 feet) in height.

It's important to note that this growth rate isn't perfectly uniform. Various factors can influence the annual measurements, including:

  • Seismic activity and earthquakes in the region
  • Erosion from wind, ice, and snow
  • Gravitational forces acting on the mountain
  • Variations in measurement techniques and technology
  • Isostatic adjustments in the Earth's crust

The Impact of Earthquakes on Mountain Height

While the general trend shows Mount Everest growing taller, major seismic events can temporarily reverse this pattern. The devastating 2015 Nepal earthquake, which measured 7.8 on the Richter scale, actually caused Mount Everest to shrink by approximately 2.5 centimeters (1 inch) according to some measurements. This earthquake resulted from the release of built-up stress between the colliding tectonic plates.

However, this temporary reduction doesn't negate the overall upward trend. Following such seismic events, the continuous tectonic pressure resumes pushing the mountain upward, eventually compensating for any height loss. In fact, some scientists argue that earthquakes are part of the mountain-building process itself, redistributing crustal material and contributing to the overall elevation of the Himalayan range over geological time.

Modern Measurement Techniques

Accurately measuring Mount Everest's height and its annual growth has become increasingly sophisticated over the years. Traditional surveying methods using theodolites and triangulation have given way to advanced technologies that provide unprecedented precision. Global Positioning System (GPS) technology allows scientists to place receivers on the summit and surrounding areas, measuring the mountain's position relative to satellites with centimeter-level accuracy.

Additionally, satellite-based radar systems and LiDAR (Light Detection and Ranging) technology enable researchers to monitor subtle changes in the mountain's elevation over time without requiring physical presence on the peak. These modern techniques have not only confirmed Everest's growth but have also helped scientists better understand the complex geological processes occurring beneath the Himalayas.

The Controversy Over Everest's Official Height

Determining Mount Everest's exact height has historically been a matter of international debate. Different countries and surveying teams have reported varying measurements due to differences in methodology, reference points, and whether to include the snow cap or measure only the rock summit. In 2020, China and Nepal jointly announced a new official height of 8,848.86 meters, ending years of disagreement between the two nations.

This new measurement, which is slightly higher than the previously accepted height, reflects both improved measurement technology and the mountain's continued growth. The collaborative effort between the two countries also represents a significant diplomatic achievement, as both nations share sovereignty over different aspects of the mountain.

Future Predictions for the Himalayas

Geologists predict that the Himalayan mountain range, including Mount Everest, will continue growing for millions of years to come. As long as the Indian Plate continues its northward journey into the Eurasian Plate, the compressive forces will persist, driving the mountains higher. However, this growth won't continue indefinitely.

Eventually, several factors will limit the mountains' height. Gravitational forces will increasingly work against further elevation, pulling material downward. Erosion from wind, water, and ice will accelerate as the peaks rise higher into the atmosphere. Additionally, the rate of plate movement may eventually slow, reducing the upward pressure. Scientists estimate that these balancing forces will ultimately establish a maximum sustainable height for the range.

The Broader Implications of Mountain Growth

The continued growth of Mount Everest and the Himalayas has significant implications beyond simple geographical curiosity. These rising mountains influence regional climate patterns, create barriers that affect monsoon systems, and serve as vital water sources for billions of people living in surrounding regions. Understanding the dynamics of mountain growth helps scientists predict geological hazards, plan infrastructure development, and comprehend Earth's complex geological history.

The phenomenon of Mount Everest's growth serves as a powerful reminder that our planet remains geologically active and constantly changing. While the changes occur too slowly for humans to perceive directly, they fundamentally shape the world we inhabit, demonstrating that Earth is truly a dynamic, living planet.