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Seeing Yellow

The colour yellow, when seen from a distance or when used with a dark background, is easiest to see, but when used alone, it is...

Polydactyly: Extra Digits

Polydactyly (from Ancient Greek (polus) “many” and (daktulos) “finger”) is a condition in which a person (or animal) has more than five fingers per hand or five...

Ice-Cream Headache (Brain Freeze)

An ice-cream headache, also known as brain freeze, cold-stimulus headache,or its given scientific name sphenopalatine ganglioneuralgia (meaning “nerve pain of the sphenopalatine ganglion“), is a form of...

Spring (Vernal) Equinox

In the Northern Hemisphere spring officially begins at 7:21 p.m. ET on Sunday, March 20, 2011—the vernal equinox, or spring equinox.  An equinox occurs...

Super Full Moon

On March 19, 2011, a full Moon of rare size and beauty will rise in the east at sunset. It’s a super “perigee moon”...
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