Caffeine is the most common stimulant. Caffeine is the most widely used drug on the planet and has been used for centuries for its stimulating effects. Most energy drinks contain between seventy to two hundred milligrams of caffeine each. For example, a full can of Rockstar contains one hundred sixty milligrams of caffeine. Caffeine stimulates the central nervous system, which gives the body a jolt of their senses, making them more alert. The use of caffeine can dehydrate the body and raise blood pressure and heart rate.
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China triangular trade with north America for chicken and cows and china gives us spices
Speak about how the world has evolved through the topics of science and technology (separately)
Discuss the fact that 40 years ago computers weren't invented and now they are beyond the capacity of a human brain.
Discuss how science nowadays has been able to uncover mysteries of the earth as well as how science has created (in cooperation with technology) robots.
Basically discuss how it has changed over the years, the importance of technology in the changing world as well as science.
