Updated timelines

Богдан Хмельницький
Civil War
Ellison S. Onizuka
Mohandas Gandhi
Hernan Cortes
Valentina Tereshkova
Sally Ride
sacagawea
Wright brothers
Ferdinand Magellan
Yuri Gagarin
Civil War
Mary Henrietta Kingsley
Neil Armstrong's time line
Marco Polo
Alexander th Great