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.
Most food poisoning cases last 1-2 days with the symptoms resolving on their own. If food poisoning lasts longer than that, one should seek medical help. The answer to how long does food poisoning last and how long does it take for symptoms to show also depends upon where the poison came from. If the tainted food contained staph, the symptoms can begin within one hour of eating.