15-10-28 A team of researchers from the Universities of Bristol and Sussex in collaboration with Ultrahaptics have built the world's first sonic tractor beam that can lift and move objects using sound waves. Tractor beams are mysterious rays that can grab an...

15-08-27 One year in the Eastern Han Dynasty, there was a serious famine in Henan. One night, a thief sneaked into Chen Shi's house and hid himself on the beam. When Chen Shi was aware of this, he got out of bed without haste, called his children and grandch...

13-07-17 There was once an enchanter（巫师，魔法师） who was standing in the midst of a great crowd of people performing his wonders. He had a cock brought in, which lifted a heavy beam and carried it as if it were as light as a feather. But a girl was prese...

11-09-23 Not long after the development of the first laser in 1960 scientists discovered that shining a beam through certain crystals produced light of a different color; more specifically, it produced light of exactly twice the frequency of the original. Th...