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 is a common illness. It is usually mild, but can become severe and in some cases fatal. Symptoms of food poisoning (such as nausea, vomiting, abdominal cramping, and diarrhoea) may start suddenly (within 48 hours) of having contaminated food or drink, or may be as late as 70 days. These symptoms are affected by many factors including type of contaminant, the amount eaten, age and your overall health.