- published: 10 Sep 2013
- views: 169120
Ageing (British English) or aging (American English) is the process of becoming older. In the narrow sense, the term refers to biological ageing of human beings, animals and other organisms. In the broader sense, ageing can refer to single cells within an organism (cellular ageing) or to the population of a species (population ageing).
In humans, ageing represents the accumulation of changes in a human being over time, encompassing physical, psychological, and social change. Reaction time, for example, may slow with age, while knowledge of world events and wisdom may expand. Ageing is among the greatest known risk factors for most human diseases: of the roughly 150,000 people who die each day across the globe, about two thirds die from age-related causes.
The causes of ageing are unknown; current theories are assigned to the damage concept, whereby the accumulation of externally induced damage (such as DNA point mutations) may cause biological systems to fail, or to the programmed ageing concept, whereby internal processes (such as DNA telomere shortening) may cause ageing.
AMAZING Timelapse Showing The Effects of Ageing Created from Family Portraits
A Cure for Ageing?: David Sinclair at TEDxSydney
Casually Explained: The Ageing Process
HOW AN AGEING POPULATION WILL CHANGE THE WORLD - BBC NEWS
Mastering time: A key to successful ageing: Claire Steves at TEDxKingsCollegeLondon
Is Ageing Inevitable? Understanding the Biology of Ageing | Open Lecture | University of Kent
Scientists close to reversing ageing
Ageing Stars
Slowing down ageing | João Pedro de Magalhães | TEDxGhent
The Science of Aging
[Music: Valnes/Eviga, Lyrics: Eviga]
Was zieht her von welken Nächten ?
Fühl' nun selbst, was diese Dir brächten,
Was sie Dir bringen ... sie schon brachten.
[Das Ich nimmt wahr]
Stummes Dunkelsehen ... stolpernder Dunkelblick ...
[Die Natur vernimmt dies selbst]
Ein menschähnlicher Riß in welker Nacht Gewand ...
[Ich]
Tapfere Töne tummeln sich ... in dunkelwellenden Unbehagen ...
Schattengroße Schwebeklänge ...
[Natur]
Ein menschähnlicher Lauschepflock ...
In welker Nächte Schlummertanz...
[Ich]
Blauschwere Süße ... gekostete Traumschleier ...
[Natur]
Ein menschleiser Sog in welker Nächte Himmelhauch ...
[Ich]
Nahegleitende Lauerlüfte ... hautzüngelnde Schlotterschergen ...
Knochenströmendes Kältewehen ...
[Natur]
Ein menschähnlicher Zittersplitter in welker Nächte grauem Wind ...
[Das Ich erkennt]
"Ich bin fassende Ungeduld
Und oft erdachtes Zögern.
Sagbar Ich,
Ein Mensch von welker Nacht Gestalt,