Presentation tomorrow: top 10

I have to finish my presentation for tomorrow. My teacher asked us to make a list of the 10 most important events, inventions, discoveries or people in the human history. Here is my list.
 1. Bikini
 2. Beer
 3. Electricity
 4. Google
 5. Gutenberg's Printing Press
 6. José Saramago
 7. Go to the Moon
 8. Che Guevara
 9. Frozen Food
10. Calculus
And I chose Calculus to explain to the class. I had to conduct a interview, so I talked with a math teacher. I realise that I miss math. I excited for my presentation, and hope my classmates are interested in my topic.
See ya.