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.
In 1928, after spending months observing his own wifeâs cervical cells under a microscope, Dr. George Papanicolaou invented the Pap smear as a method to detect cervical cancer.is discovery has stood the test of time. And Dr. Papianicolaou can be credited with the fact that cervical cancer is now a rare cause of death in the United States in spite of the fact that it remains the leading cause of death in countries where Pap smears are not routinely done.