Summary:
- Archaeologists in Sweden discovered a mysterious bronze object that was initially thought to be a bronze ingot, a common find from the Bronze Age.
- However, upon closer examination, the object turned out to be a unique and rare artifact - a Bronze Age "sun stone" or "sunstone," which was likely used as a navigational tool by ancient seafarers.
- The sunstone is a calcite crystal that can detect the sun's position even on cloudy days, allowing ancient mariners to determine their direction and location, making it a significant discovery that provides insights into the advanced navigation techniques used during the Bronze Age.