Album: Earth & Universe,
New uploads: 11,
Hits: 3222,
Size: 0MiB
An aurora (plural: aurorae or auroras) is a natural light display in the sky particularly in the high latitude (Arctic and Antarctic) regions, caused by the collision of energetic charged particles with atoms in the high altitude atmosphere (thermosphere). The charged particles originate in the magnetosphere and solar wind and, on Earth, are directed by the Earth's magnetic field into the atmosphere. Aurora is classified as diffuse or discrete aurora...
Album: Pictures of the Day,
New uploads: 60,
Hits: 14452,
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A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership.
They can either be tagged as POTD or displayed in a special page on that site...
Album: Transport,
New uploads: 2,
Hits: 548,
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A physical disability is any impairment which limits the physical function of one or more limbs or fine or gross motor ability. Other physical disabilities include impairments which limit other facets of daily living, such as respiratory disorders and epilepsy.
Causes of physical disabilities
• Prenatal causes: Those disabilities that are acquired before birth. These may be due to diseases that have harmed the mother during pregnancy, or genetic incompatibilities between the parents...
Album: Architecture & Design,
New uploads: 22,
Hits: 2860,
Size: 1MiB
Stairway, staircase, stairwell, flight of stairs or simply stairs are names for a construction designed to bridge a large vertical distance by dividing it into smaller vertical distances, called steps. Stairways may be straight, round, or may consist of two or more straight pieces connected at angles.
Special stairways include escalators and ladders. Alternatives to stairways are elevators, stairlifts and inclined moving sidewalks as well as stationary inclined sidewalks...
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