🕌
670 AD — Arabs found Kairouan in Africa
In 670, Arab forces founded Kairouan in Tunisia — the first Muslim city in Africa. From here began the Islamisation of the entire Maghreb.
History
🔴
670 nm — wavelength of the red laser
670 nanometres is the wavelength of a typical red laser diode — used in laser pointers and first-generation CD players.
Science
🦋
13 → 4: transformation to foundation
6+7+0=13→4. Tarot's Death card leads to four-foundation. The zero at the end — space after transformation.
Numerology