What happened during the last two days of March?

(Baonghean.vn) - The last two days of March saw many significant events in world history, including the following seven notable events.

1. March 30, 239 BC: Halley's Comet is first discovered.

According to records, the first people to discover Halley's Comet were two Chinese astronomers who detected signs of a star moving at a very high speed in 239 BC. At that time, Halley's Comet had an elliptical orbit, on its way out of Neptune's orbit to begin orbiting Venus. Halley's Comet was also the first comet discovered in astronomical history.

Image of Halley's Comet.

The British astronomer Edmond Halley predicted the appearance of Halley's Comet, which could be observed from Earth, in 1759. His prediction came true, and the comet was named after him.

2. March 30, 1858: The invention of the pencil with an eraser.

The pencil comes with an eraser.

Hyman L. Lipman invented the eraser, which was attached to one end of a pencil, and patented it in the United States in 1858. The eraser was made from a type of Indian rubber. It proved to be a very useful and convenient invention.

3. March 30, 1899: The horseshoe was invented.

In 1899, American inventor James Ricks improved the previously used horseshoe, made of stone or wood, into an iron horseshoe. His invention was soon patented and widely used in the United States.

His iron horseshoe design was V-shaped with a screw that could be tightened to securely clamp onto the horse's hoof. He later experimented with rubber horseshoes, but without success. And iron horseshoes are still widely used today.

4. March 30, 1791: Regulations on the system of measurements were established.

Did you know that it's conventionally understood that 1 meter is 1/10 millionth of the distance between the North Pole and the equator?

In 1791, several French scientists, including Borda, Lagrange, Laplace, Monge, and Condorcet, presented to the French National Assembly a system of measurement based on international standards. The French National Assembly subsequently agreed to adopt a system of measurement that stipulated that one meter was equal to one-tenth of the distance between the North Pole and the equator.

5. March 31, 1989: The oldest known dinosaur embryo fossil was discovered.

In 1989, archaeologists discovered a 150-million-year-old dinosaur egg fossil in Utah. This was the first dinosaur egg fossil discovered still inside the mother dinosaur, and also the oldest fossil, over 100 million years old. Scientists discovered this fossil among many other dinosaur skeletons, so it is very likely a nest of a dinosaur species from the Cretaceous period.

6. March 31, 1966: Successfully launched a spacecraft into lunar orbit.

In 1966, the Luna 10 spacecraft was successfully launched into lunar orbit from Earth. This was the first spacecraft to reach lunar orbit, developed by the Soviet Union. After landing, Luna 10 completed its first orbit in just three hours.

This spacecraft carried a gamma-ray spectrometer and a magnetometer to measure radiation and magnetic fields on the Moon. After completing 460 orbits around the Moon, Luna 10 ceased operation after running out of energy.

7. March 31, 1889: The Eiffel Tower is inaugurated in Paris.

In 1889, the famous Eiffel Tower in Paris, France, was inaugurated and immediately became the tallest tower in the world at that time. At 300 meters tall, the Eiffel Tower held this record until the Empire State Building was constructed 40 years later.

The tower's distinctive design was created by the 56-year-old architect Gustave Eiffel, and it was named after him. Initially, the structure sparked controversy regarding its aesthetics and functionality. Nevertheless, the Eiffel Tower quickly achieved success, becoming a top tourist attraction in France.

Kim Ngoc

(Synthetic)