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According to recent estimates, the earthquake that hit China on Monday could leave 10,000 people dead. Web users are saying that the catastrophe could have been avoided, if only they had listened to the toads.
Two days before the quake thousands of toads suddenly decided to move across a bridge in Taizhou, a town in the Jiangsu province (see photos). Chinese web users are wondering why the local authorities didn't relate the event to the imminence of an earthquake, and why scientists didn't take notice of the bizarre disappearance of a lake in Enshi, in the Hubei province, on April 26 (see photos).
In 132, Zhang Heng presented to the Han court what many historians consider his most impressive invention. Zhang Heng invented the first seismometer, called Houfeng Didong Yi (lit. instrument for measuring the seasonal winds and the movements of the Earth), for determining the exact direction of tremors and earthquakes. According to the Book of Later Han (compiled by Fan Ye in the 5th century), his copper-made urn-shaped device, with swinging inverted pendulum inside, was able to detect the direction of an earthquake from hundreds of miles/kilometers away. This was essential for the Han government in sending quick aid and relief to regions devastated by this natural disaster. Later Chinese of subsequent periods were able to reinvent Zhang's seismograph, including the 6th century mathematician Xindu Fang of the Northern Qi Dynasty, and the astronomer and mathematician Lin Xiaogong of the Sui Dynasty (581–618). On June 13, 2005, modern Chinese seismologists announced that they had successfully created a replica of the instrument