Acoustic Weapons
Sound Weapons: An Emerging Threat with Non-Lethal ClaimsTraditionally, sound weapons have been viewed as non-lethal; however, this perception may soon...
Spring-driven clock
From water clocks, inventors sought to create another device for measuring time. The first person to create a mechanical clock...
Hourglass and Hour Candle
In addition to the two types of timekeeping devices—sundials and water clocks—there is also the hourglass (sablier), which is used...
Water Clock
When using sundials, people encountered several inconveniences, such as the inability of sundials to tell time on rainy days or...
Successful Trial of Gas-Powered Garbage Truck
After nearly two years of research and design, on January 10, engineer Lê Minh Hải and his team at Đồng...
Sundial
Due to chance observations, ancient people noted that the shadow of a tree trunk would change as the sun moved...
How Did Cosmetics Come into Being?
Archaeological sites in Egypt indicate the presence of cosmetics dating back 6,000 years. Wealthy Egyptian women often applied light green...
Who invented the layered computed tomography machine?
Today, computers have become ubiquitous in every aspect of society. However, over 30 years ago, the successful research of computed...
The People Who Are Changing Our Lives
Solar Energy Features Bill Gross's ambition to transform solar energy into electricity faces a significant obstacle: the Earth does not...
The Degrees of Time
For a new awareness of history, merely witnessing the living remnants of the past is not enough. There is another...
