What's the most important invention?

WHAT’S THE MOST INTERESTING INVENTION?

THE AIR BAG

The first airbag was installed in the Mercedes S-Class in 1980. Airbag, also known as air bag or airbag is a safety component of the cars. When the vehicle undergoes a great impact, various sensors disposed in strategic parts of the vehicle star working. This device consists of nitrogen pellets that are driven by an electric discharge within an electronic central air balloon very sturdy, preventing driver and passengers suffer physical damage mainly on the face, chest and spine. A recent study found that about 6,000 lives have been saved thanks to the airbags.

THE TOILET PAPER

The toilet paper is a great invention. Everyone needs it. The first package toilet paper was invented by the American Joseph Gayetty and he called it Medicated paper. In the beginning, the toilet was bought in boxes of small pre-cut squares. Later on, in 1879, the Scott Paper Company began selling the first toilet paper on a roll, and nowadays it is the most popular one. The four-ply toilet paper is softer but it is more expensive. This accessory became an item of first necessity for all the people around the world.

Possibly had been the water surface which inspired the manufacture of the first mirror. Were discovered in the remains of civilization Badarian (Egypt, near the Nile), copper mirrors, left by primitive man in the fifth millennium BC.
A mirror is a very smooth surface and allows a high rate of reflection of the light falling on it. Mirrors have various shapes: flat spherical.
There are several superstitions about the mirror, for example, seven years of chance. This is a belief of primitive peoples, who believed that the image would have some reflective soul connection.