Gumball machines History of gummbals – around 215 BC. the first vending machines were located in Egyptian temples and dispensed … More

Great Wall of China – a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally … More

Graphene’s discoverers were awarded the 2010 Nobel Prize in Physics for their find. And it’s no wonder; the material is … More

Build your dream (video 1:15) – See How Engineers Can Make A World of Difference – The National Academy of … More

Gravity (images) – Regardless of the mass of the object, a free falling object will accelerate towards the Earth at … More

Grader – a construction machine with a long blade used to create a flat surface during the grading process. Typical … More

graphic computer system – Created by Doug Engelbart in the 1960s, controlled by a special keyboard and something called a … More

Golf – precision club and ball sport in which competing players (or golfers) use many types of clubs to hit … More

“Green” means environmentally friendly and sustainable. Green chemistry creates products and processes that are safer and cleaner — from the … More

The Fibonacci sequence (also known as the Golden Ratio) has interested mathematicians, artists, designers, and scientists for centuries. The Fibonacci … More

Grace Hopper – (December 9, 1906 – January 1, 1992) – an American computer scientist and United States Navy Rear … More

U.S. EPA Mercury Capture System (video 4:59) – a solution to the severe health risks caused by mercury emissions from … More