The Golden Gate Bridge has expanded up to 3 meters in summer heat since 1937.

In 1971, the first email was sent.

The internet connects billions of people instantly.

The lithium-ion battery, now powering billions of devices, was developed in the 1970s–80s by researchers including John Goodenough.

Wikipedia has over 65 million articles across all languages — English alone has over 6 million.

The camera allowed images to be captured and preserved.

The submarine cable enabled intercontinental communication.

The Statue of Liberty was engineered with an internal iron framework.

Steel was a rare luxury material in the ancient world — mass production became possible only in the 19th century.