H5N1 has led to the killing of 170 million birds. And the virus is mutating, risking a human pandemic.
The fight for the $150 million emerald industry in Colombia
Colombia produces the world's most expensive emeralds — a treasure that's been fought over for centuries.
Why the NYC Ballet spends nearly $1 million a year on pointe shoes
New York City Ballet dancers go through about 7,000 pairs of pointe shoes a year. That's because traditional ones break down after only a few wears.
Why mangosteen, the viral TikTok fruit, is so expensive
Buying a little over a kilo of fresh mangosteens in the United States can cost nearly $80. Farmers are cutting down other fruits to grow more.
Why climbing Mount Everest is so expensive
Adventurers shell out tens or even hundreds of thousands of dollars for the privilege of attempting the world's highest peak.
How Adult Fans Saved Lego
The most expensive Lego sets cost $850. How did Lego go from a children's toy to a collector's item? And why is it so expensive?
Why English Willow Cricket Bats Are So Expensive
Top-grade cricket bats used by the pros are made out of English willow. They can sell for over $1,000.
Climbing Mount Everest can be deadly. Some Sherpa guides say the grueling work isn't worth it anymore.
Sherpas are built to climb Everest. But high risks and relatively meager pay of guide work could drive the next generation away from the mountain.
Cement tiles used to be affordable, but they can cost 10 times more than subway tiles
Cement-tile artisans use colorful pigments to form hundreds of designs. The product can cost 10 times as much as subway tiles.
Why pedal harps are so expensive
Pedal harps can cost $70,000 — far more than lever harps, which cost $2,000 to $9,000. At Camac in France, every harp is carved and assembled by hand.
Why some Sherpas say there won't be any guides on Everest in 10 years
Everest mountain guides earn $4,000 to $10,000 per climb. They can count on only one expedition a year.
Every piece of gear you need to summit Everest, according to a Sherpa guide
Pastemba Sherpa, a Mount Everest guide, breaks down every piece of gear he uses to summit the world's tallest mountain.
Inside the hidden hotels that keep Mount Everest running
On the Everest base-camp trek, teahouses provide a hot meal and a warm bed. Porters, who carry everything, often stay separately from the climbers.
What happens to Mount Everest's over 110,000 pounds of waste?
There are an estimated 50 metric tons of waste on Mount Everest, and Nepal's residents are finding creative ways to deal with it.
Egyptian cotton sheets can cost $900, but the internet is filled with fakes
Egyptian cotton is known for being luxurious, and sheets made with it can cost over $900. But what you're buying might not be real Egyptian cotton.
How miners find, cut, and transport the most expensive amethysts in the world
Amethyst is one of the most common crystals on Earth, but it can cost upwards of a million dollars. Here's why amethyst geodes are so expensive.
10 of the most expensive items made in India
We traveled the length of the subcontinent to uncover the stories behind some of the most expensive products made in India.
Why clients wait months for a Savile Row suit made by a master tailor
Bespoke suits from Savile Row can cost £6,000 and up due to the handmade craftsmanship and the attention to detail.
So Expensive season 11 marathon
We uncovered the stories behind the world's most expensive items, from natural latex mattresses and bespoke dress shoes to handmade calligraphy ink.
Why handmade Korean paper, called hanji, is so expensive
Hanji is traditional Korean paper made by hand from mulberry trees. The most expensive hanji costs over $20 per sheet.