Each epoch has at least one of its great scientific discoveries

For example, one of the first great discovery of the world was finding wheel.

It is a very general question and very dependent on a specific scientific field. IMHO, in astronomy, a very important discovery was that Earth is a sphere rotating around its axis and around the Sun.

Dear Masoud Kamran,

You have provided a good overview of the most important scientific steps that have been made through history.

I agree with Jan Balaz

1. The invention of writing

2. Discovery of wheel

3. Production of paper

4. The invention of the printing press

5. Internet

.........

Dear, Harun Hadžić ,

All are important , but I think that discovery of electricity is the most important , because all of them depends on electricity .

Probably the LARGEST scientific step in HISTORY:

26.06.2000. scientists have decoded 85 percent of the human genome - which, according to many, is the greatest discovery in the history of mankind.

Since then, a real revolution has been launched in finding various options for treating diseases that affect millions of lives.

https://www.blic.rs/slobodno-vreme/vesti/najvece-otkrice-u-istoriji-na-danasnji-dan-su-naucnici-promenili-svet/j0hq8kw

The first steps were the most difficult: for example a wheel ...

I thik the discovery of the structure of DNA, by Watson and Crick

i think the establish of coordinate system by Descartes .

The snooze alarm!