What are the best and the most useful inventions of the mankind in the 20th and 21st centuries?

I will start with the top ten of the 20th century and then the top ten of the current century.

• Radio. Not many people can appreciate the impact the advent of radio had on 20th century.
• Internet. ► Inventions.
• Television.
• Antibiotics.
• The Submarine.
• Rocketry.
• Automobile.
• Airplane.

What is the most important invention ever most people?

Top 10 Inventions That Changed the World

• The compass.
• The printing press.
• The internal combustion engine.
• The telephone.
• The light bulb.
• Penicillin. (Image credit: National Institutes of Health)
• Contraceptives. (Image credit: Public domain)
• The Internet. (Image credit: Creative Commons | The Opte Project)

What do you think is the best and the most useful invention of the mankind in the 21st century Why?

3D printing, E-cigarettes among the most important inventions of the 21st century. The human race has always innovated, and in a relatively short time went from building fires and making stone-tipped arrows to creating smartphone apps and autonomous robots.

What inventions do we need in the world?

11 Simple Inventions That Could Change The World

• Chewing gum that fixes your teeth.
• A mouth guard that can detect concussions.
• An Internet-enabled, portable hand sanitizer.
• A smokeless solar cooker for developing countries.
• A cheap, portable water filtration device.
• Water pipes that monitor their own leaks.

What are some inventions that the world needs?

19 Inventions That Will Soon Change the World

• Packaging that changes color if the product inside is expired.
• A water-filtering straw.
• A pancake printer.
• A mat with a built-in alarm clock.
• A pendant that turns speech into text.
• A toothbrush that cleans your teeth by itself.
• “Smart” glasses.
• A glass that turns water into wine.

https://www.youtube.com/watch?v=SzJcy6ZuZwI