1 Calories Burned For Walking: 4.6 km/h (13 minutes per km). 2  Calories Burned For Walking: 4 km/h (15 minutes per km). 3  Calories Burned For Walking: 3.15 km/h (19 minutes per km).
The first true hypodermic syringe was created by Alexander Wood in 1853. He modified a regular syringe, which at that time was used for treating birthmarks, by adding a needle. He then used this new device for introducing morphine into the skin of patients who suffered from sleeping disorders.
The First Reference to the Menstrual Pad. The first mentions of the menstrual pad were seen around the 10th century when Hypatia, a Greek Alexandrian philosopher was said to have hurled one of her used menstrual rags at a gentleman caller when she did not wish to be called upon.