H5N1 has led to the killing of 170 million birds. And the virus is mutating, risking a human pandemic.

More from So Expensive From the purest form of maple syrup, extracted drop by drop from trees in New York, to the finest polished-rice sake, crafted by Japan's youngest female sake brewmaster ...

Geoduck clams, known for their phallic shape, cost up to $30 a pound. But the industry depends on buyers in China, where the economy is slowing.

How did Lego go from a children's toy to a collector's item? And why is it so expensive? More from So Expensive Lego is the world's largest toy company, but it's gained a reputation for being an ...

So how is porcelain made and why is it so expensive? More from Retail Handmade ceramics aren't cheap, but porcelain is often even more expensive. Compared to other ceramics, porcelain is non ...

Now, oxtail's longtime fans are fighting to #MakeOxtailCheapAgain. More from So Expensive In the US, oxtail was once considered a cheap and undesirable cut of beef. That's because it's mostly bone ...

The wood is so precious — and so expensive — that the French government heavily regulates its sales through annual auctions of oak forest plots. More from So Expensive Luxury winemakers ...