In which year was Nelson Mandela released from prison?

In what year did the Chernobyl nuclear disaster occur?

In what year did the French Revolution begin?

In which year did the Soviet Union collapse, leading to the end of the Cold War?

What year was the United Nations founded?

When was the World Wide Web publicly introduced?

When was the first human heart transplant performed?

What year marked the beginning of World War II?

When was the first successful printing press invented by Johannes Gutenberg?

In what year did the Berlin Wall fall?

What year did the Titanic sink on its maiden voyage?

What year was Facebook founded?

When did the Great Fire of London occur?

In which year was the first modern Olympic Games held?

In which year did India gain independence from British rule?

When did Neil Armstrong and Buzz Aldrin land on the moon?

When did the construction of the Great Wall of China begin?

In what year did the First World War begin?

What year was the Declaration of Independence of the United States adopted?

When was the original iPhone released?