1869
Science
Russia
Periodic table
Mendeleev orders the elements by weight and property, leaving gaps for the undiscovered.
Why it mattered
Chemistry became predictive rather than descriptive.
Industrial Age
1869
2 recorded milestones at this point in the record.
1869
Transportation
Egypt
Suez Canal opens
A sea-level cut joined the Mediterranean and Red Sea.
Why it mattered
Redrew global shipping routes.
Sign in to amend this page or add a milestone — every edit is signed and kept in the record.