Enlarge / Daan Roosegaarde is the artist behind the glow-in-the-dark Van Gogh fietspad (bike path). (credit: Daan Roosegaarde, CC BY-SA 3.0) Around the year 1603, Italian shoemaker and amateur alchemist Vincenzo Casciarolo tried smelting some especially dense stone he had found on the slopes of Mount Paderno, near Bologna. No gold, silver, or other precious […]
