Updated timelines

WWI events
HISTORIA DE LA FOTOGRAFIA
Genetics
Richie R. Beagle Voyage
WWII timeline
Infancy and Childhood Timeline
gun legislation
Mi experiencia con la tecnología
Gun Legislation
MI RELACION CON LA TECNOLOGIA
sistema operativo
Brief History of Early Childhood Education
Early Education History Timeline
Gun Control Legislation in the United States
WW2 Events
Major Turning Points of WWI