Check out the amazing machines that make space travel possible.

From the spaceship itself to the wrench needed to make in-flight repairs, machines of every kind are the backbone of space travel. In this, ...

Travel from the ancient hidden city of Machu Picchu high in the Andes, past Mayan ruins over 2,000 years old, to the bustling modern cities of São Paulo and Buenos Aires. Learn about the vibrant cultures ...

Acupuncture, gun powder and the secrets to spinning silk are innovations that we have come to associate with China. But did you know that the Chinese also invented the umbrella? And toilet paper, initially ...