Bert Hansen

How a 19th-century invention could save lives today.

It’s one thing to make a scientific discovery, but making it count is another thing entirely.

Candy stores in the 19th century sold sweets as deadly as they were delicious.

In the late 19th century booming cities faced a new threat—their own food.

America in the 1880s might seem far from the long-past world of European alchemy, but the hoary image of the alchemist vainly trying to make gold was so familiar to the public that it could serve to mock politicians during the bustling time Mark Twain dubbed the “Gilded Age.”