Còn trai 14 tuổi dài bao nhiêu cm

One fun fact about the Roman Empire is that they used urine as a cleaning agent. Ammonia, a key component in urine, was effective for cleaning clothes and whitening teeth. The Romans collected urine from public urinals and used it for various purposes, including tanning leather and even in medicine. They considered urine from different sources to have different properties; for example, they believed Spanish urine was best for whitening clothes. This practice might seem odd today, but it was common in ancient Roman society.