Inventions That Changed the World

Some inventions changed how people live everywhere. Writing, first developed in ancient Mesopotamia about 5,000 years ago, let people keep records and share ideas. The printing press, built by Johannes Gutenberg around 1450, made books faster and cheaper to produce, so more people could learn to read.

The steam engine powered factories and trains in the 1700s and 1800s. The light bulb, the telephone and later the internet changed how we work and communicate. Each invention solved a problem and created new possibilities.