Connect to this page in the internet:
http://www.datesandevents.org/events-timelines/12-technology-timeline.htmAnswer these questions:
- When did they invent the first known calculator?
- Where did they invent the suspension bridges?
- Who invented the microscope? When?
- Vaccunation was a breaktrouh in medicine. When was it invented? Who did it?
- When was electric motor invented?
- In which two centuries have more inventions happened?
