Galileo Galilei-Galileo (1564-1642) was the most successful scientist of the Scientific Revolution, save only Isaac Newton. He studied physics, specifically the laws of gravity and motion, and invented the telescope and microscope.
1 Stools that are black, tarry, or bloody.  You recognize symptoms of chemical or toxin food poisoning, such as vomiting, diarrhea, sweating, dizziness, tearing in the eyes, excessive salivation, mental confusion, and stomach pain, beginning about 30 minutes after eating contaminated food.
Food poisoning takes place when you eat whatever carries the antagonistic microbes. The main effects follow at various times, generally quickly: Nausea and urge to vomit can come within minutes. Fever can begin as soon as the microbes first begin to enter the blood stream, within 10 or 20 minutes.