2. Forum: Important Discoveries and Inventions

1)     What do you think are the most important inventions/discoveries at any time in the past?

2)     Which of them wouldn’t you be able to live without? Which of them would you be able to live without?

3)     Do you know any background related to an invention?

4)     Is there anything that has not yet been discovered/invented, but would be nice/important to discover/invent?

Answer these questions in this forum.