Compound interest. Compound interest is the addition of interest to the principal sum of a loan or deposit, or in other words, interest on interest. It is the result of reinvesting interest, rather than paying it out, so that interest in the next period is then earned on the principal sum plus previously-accumulated interest.
Guanches (also: Guanchis or Guanchetos) refer to the aboriginal Berber inhabitants of the Canary Islands. It is believed that they migrated to the archipelago around 1000 BC or perhaps earlier.
The Mystery of the Guanches and the Pyramids of Tenerife. (Read the article on one page) Tenerife in the Canary Islands is well-known as a holiday destination, but many tourists visit the island unaware that there are pyramids there and an ongoing mystery.