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gunpowder, guns, firearms

Gunpowder, 10th century – Outsourced killing to a machine |firearm – a portable gun, being a barreled weapon that launches … More

hand tools

Engineering is about problem solving. Many of life’s little problems can be solved by an engineer with the right tools. … More

gyroscope

Gyroscope – The device is a spinning wheel on an axle. The device, once spinning, tends to resist changes to … More

hand battery

The hand battery To do and notice Put your left hand on the aluminum plate and your right hand on … More

gumball machine

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

Great Wall of China

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

green plastic

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

greatest…

There are plenty of lists of Greatest… Here are some of the lists. There are many duplicates and items that … More

Graphene

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

gravity

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

green building

Green building As new building are constructed and old buildings are renovated, designs are including features and processes to “go … More

grader

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

graphic computer

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

golf

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