How We Use Crystals To Tell Time
Quartz clock operation is based on the piezoelectric property of quartz crystals. If you apply an electric field to the crystal, it changes its shape, and if you squeeze it or bend it, it generates an electric field. When put in a suitable electronic circuit,…
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Geology
Seamounts - Underwater Mountains
Seamounts are undersea mountains that rise from the ocean floor, often with heights of 3,000 m or more.…
Biology
Why Tree Twig Twine Twists Tongues
Even though we call it a 'tongue twister,' it isn't really your tongue that has a hard time saying 'sixth sick…
Physics
The Coriolis Effect
The Earth, rotating at about 1000 miles per hour (1,609 km/hr), influences the flow of air and water on its…
Astronomy
Crab Nebula
For millions of years a star shone in the far off constellation of Taurus. So far away, and so faint that even…