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 paraaramid fiber under the trademark of KevlarÂ® was invented in 1965 and patented by DuPont. It was about 25 years ago that the first generation of KevlarÂ® fibers under the name of KevlarÂ® 29 was used in US ballistic vests for the first time.