What are the inventions of the early 19th century

The inventions of the 20th century were: penicillin, the space shuttle, television, the DNA double helix, and the mobile phone.

1. Penicillin.

Before the 40s of the 20th century, human beings have not been able to master a drug that can effectively infect bacteria and be small. At that time, if someone had tuberculosis, it meant that the person would die soon. In order to change this situation, researchers have been exploring for a long time, but the breakthrough in this area is due to an accidental discovery.

In modern times, in 1928, the British bacteriologist Fleming first discovered the world's first antibiotic - penicillin, and Alexander Fleming discovered penicillin due to a lucky mistake.

2. Space shuttle.

In 1959, the Soviet Union's unmanned spacecraft successfully landed on the moon for the first time, and a large number of ** were returned. The Apollo moon landing in the late 60s was the first step for mankind to set foot on a planet other than Earth, and since then, the United States has gradually left the Soviet Union behind in space exploration. With the advent of the Space Shuttle, the chances of success in traveling to outer space have increased dramatically, and scientists predict that humans will travel to outer space after the year 2000 AD.

3. TV. In 1923, the soul of television, the picture tube, was born. Television technology was widely used in the 40s, 1954 ushered in the era of color television, and after the 60s, almost most countries established television stations.

This square box has created countless happy moments for mankind.

4. DNA double helix structure.

In February 1953, Watson and Crick saw through Wilkins a very beautiful X-ray diffraction of a DNA crystal taken by Franklin in November 1951.

This inspired them. Not only did they confirm that the DNA must be a helical structure, but they also analyzed the helix parameters. They took the judgment of Franklin and Wilkins and added it:

The phosphate group forms the backbone of two polynucleotide chains on the outer side of the helix in opposite directions; The bases are on the inside of the helix and correspond in pairs.

For several days, Watson and Crick happily built models out of tin sheets and wire in their offices. On February 28, 1953, the first molecular model of the DNA double helix structure was finally born.

5. Mobile phone. Once the exclusive equipment of Big Brother in hero movies, "Big Brother" has become a private means of communication for people when they are outdoors. The development of the global economy has made mobile communications one of the hottest industries in recent years.

The convenience of mobile phones to communicate anytime and anywhere has also changed the traditional way of communication between people.