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...ogv|300px|thumb|right|[[Mung bean]] seeds germinating, a 10-day time-lapse in roughly 1 minute]] ...an at which it was captured, which slows down an otherwise fast action, as in [[slow motion]] or [[high-speed photography]]. ...

...f the head and rest in front of the ear canal, leaving the ear canal open. In the context of [[telecommunication]], a [[Headset (audio)|headset]] is a co ...Bluetooth]], [[DECT]] or [[FM radio]]. The first headphones were developed in the late 19th century for use by [[Switchboard operator|telephone operators ...