Updated timelines

Frederick the Great
Leonardo Da Vinci's Life
Isaac and Jacob's Life
Marie Curie
Marie Curie timeline
Anaximandro
Skylab- The First Space Station
Skylab- The First Space Station timeline
Phiip II of spain
Mikhail Gorbachez
Vladimir Lenin
Vladimir Lenin timeline
Jonas Salk
Winston Churchill
Breve historia de la computación en Costa Rica
The Trojan War by David Preciado
The Trojan War by David Preciado timeline
World Events 1769-1821
Mexican Independence
Revolución francesa