From the Wright brothers who flew a plane for the first time, to a country that launched a rocket called Sputnik into space for the first time, the 20th century showed our rapid advance in technological feats. We countdown from 23 to 11 events that include a new vaccination for the polio epidemic, a leap in human rights with a new Declaration, and the invasion of Poland that started a world war.
| Name | Type | Role | |
|---|---|---|---|
| Mike Kenneally | Director |