Witness the building of 4 World Trade Center skyscraper in New York City

Witness the building of 4 World Trade Center skyscraper in New York City

Time-lapse video of the building of 4 World Trade Center, New York City.
  • Contunico © ZDF Studios GmbH, Mainz; Thumbnail Gary Todd; © Georgios Kollidas/Dreamstime.com
    Overview of the invention of the telephone, with a focus on the work by Alexander Graham Bell.
  • Contunico © ZDF Studios GmbH, Mainz
    Learn about the production of ethanol as a biofuel in Brazil.
  • Encyclopædia Britannica, Inc.
    Learn about the origins and diversification of uncrewed aerial vehicles, or drones, from early military models to modern consumer-level devices.