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 PCR technique was first widely used to diagnose Ebola in 2000. Several groups of researchers are working on even faster, more portable tests, using disposable materials resembling home pregnancy tests, Science magazine reported last week. Two of the diagnostics will be tested in the coming weeks.