Analysis of information sources in references of the Wikipedia article "Lava lamp" in English language version.
The oil, heated by electricity, produces bubbles that slowly ascend through the colored liquid, creating a hypnotic display which is amusing to folks high on mind-expanding drugs.
Hippie accessory invented by Edward Craven Walker in England in 1963, [...] Stoners stare at these blobs for hours at a time, a practice known as 'spacing out.'
