Statements (24)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
physical phenomenon
|
| gptkbp:affects |
Animal Communication
Human circadian rhythms |
| gptkbp:causedBy |
Earth's axial tilt
|
| gptkbp:characterizedBy |
Continuous darkness
|
| gptkbp:duration |
More than 24 hours
|
| gptkbp:firstObserved |
gptkb:Indigenous_Arctic_peoples
|
| https://www.w3.org/2000/01/rdf-schema#label |
Polar Nights
|
| gptkbp:impact |
Vitamin D production
|
| gptkbp:latitudeRequirement |
Above Arctic Circle (66.5° N)
Below Antarctic Circle (66.5° S) |
| gptkbp:longestDuration |
At the poles (up to 6 months)
|
| gptkbp:occurredIn |
gptkb:Polar_Regions
gptkb:South_Pole gptkb:North_Pole Winter |
| gptkbp:opposedBy |
gptkb:Midnight_Sun
|
| gptkbp:relatedTo |
gptkb:Polar_Day
|
| gptkbp:shortestDuration |
At the Arctic and Antarctic Circles (1 day)
|
| gptkbp:studiedBy |
gptkb:Meteorologists
Astronomers |
| gptkbp:bfsParent |
gptkb:Tokyo_Tapes
gptkb:Virgin_Killer |
| gptkbp:bfsLayer |
7
|