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  • Tuesday, November 20, 2018
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Facts of the Matter


Gravitational waves noted from ancient crash in space

According to general relativity, gravity is not a force that pulls on matter through empty space. Read More

CRISPR gene editing offers promise for treating defects

A new gene editing technique called CRISPR-Cas9 has turned the biology world upside down and will have an immeasurable effect on genetic and molecular biology research in the coming years. Read More

Magnetic field helps guard Earth and guides travelers

Using nothing but a compass as a navigational tool, ancient mariners from China to Sumer navigated the world’s oceans. Even in the modern age of GPS, the magnetic compass is anunfaltering navigational tool for seagoing vessels, airplanes and hikers on the ground. Read More

7-day week has been around since the late Roman Empire

If you do not like the seven-day week, blame it on Constantine the Great, first Christian emperor of the Holy Roman Empire from A.D. 306 to 337, who officially adopted it in 321. Read More

No, we need not be present for a falling tree to be loud

When a tree falls and there is no one there to hear it, does it make a sound? It depends on what you mean by sound. We think we know what it means because our perception of sound is second in importance only to sight. Read More

As timekeeping advanced, accuracy greatly improved

The earliest clocks relied on the movements of the sun and stars. A sundial consists of a stick or gnomon that casts a shadow on a flat surface with numbers to represent hours or other measures of time. Read More

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