Space science
The dying star unleashes mysterious circles
Astronomers have discovered that the red giant star V Hydrae is releasing strange smoke-like rings before exploding.
Hourglass
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Articles about Hourglass
4 published items.
Discover science
Discover methods of measuring time
The idea of measuring time only appeared about 5,000-6,000 years ago when people began settling down and building civilizations. Before that, time was divided into two…
Science invention
The inventions help see the time before the clock
Clock is an indispensable item in daily life. But do you know how the clock is viewed before the clock is available?
Science invention
Hourglass and candles just hours.
In addition to the two types of sundial clocks and water meters, there are also hourglass (sablier) used for short periods of time. Origin from Egypt, this type of watch…