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.
How Long Does Poison Ivy Take to Heal Poison ivy rash can appear as early as 3 to 4 hours or as late as 7 to 10 days after exposure to the plant. It all depends upon the level of sensitivity of the individual to the plant.