|
Author Question: The center screw of the ________ can become worn with time. A. scissors C. railing B. Mayo D. ... (Read 34 times) |
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
In 1864, the first barbiturate (barbituric acid) was synthesized.