Three lost black technologies in history
First, the drone wood sparrow
In fact, as early as 2,000 years ago, that is, the Warring States period, the model of the drone has appeared, and its inventor is Lu Ban. According to legend, Lu Ban in the Warring States period made a wooden tool shaped like a finch out of bamboo wood, and according to historical records, this wooden finch could fly in the sky for three days without falling. Such a great invention, unfortunately, did not record his way of making. This is also because after Lu Ban invented the wooden sparrow, he took it to Mozi to show off. However, after reading it, Mozi thought that this thing had no practical use at all, and mocked Lu Ban. After Lu Ban was brainwashed by his spit and scolding, he really abandoned this invention, so there is no alignment record in later generations.
2. Seismometers
The earliest seismometer after the fieflite instrument, the ground motion instrument is the world's first instrument to test earthquakes, its inventor is the Chinese Eastern Han Dynasty scientist Zhang Heng, it is said that the Eastern Han Dynasty earthquakes are frequent, from 96 to 125 AD. In the 30 years of the year, there were 23 relatively strong earthquakes, so in 132 Zhang Heng made an instrument to determine the direction of the earthquake, weather and geokinetics, and the West did not invent an instrument similar to this instrument until the end of the 19th century, which shows how advanced China was at that time.
3. The Qin Army Bows
With the excavation of the Terracotta Warriors and Horses of the Mausoleum of the First Emperor of Qin, more and more Qin cultural relics are exhibited, and now in front of people, there is one thing that shocks the experts, the Qin Gongnu. According to experts, the range of the Qin crossbow is 800 meters, which is twice the range of the modern Soviet AK47, which shows how terrifying the Qin Dynasty's armed forces were at that time, and it is no wonder that Qin Shi Huang was able to unify several countries.