CODEX Entry 3701: Bolivian Salt Flats   These are the world's largest salt flats, at over 10,000 square kilometres (3,900 sq mi) in area at an elevation of 3,656 meters (11,995 ft) above sea ...

CODEX Entry 8300: Human pheromones, the slave gene   The variety of molecules that animals have evolved to use as pheromones is enormous. The first pheromone was chemically identified in moths, ...

CODEX Entry 3441: Mt Katla   Katla, or Kettle, 40 km south east of Hekla, is very active, with twenty eruptions between 930 and 1918. The volcano normally erupts every 40–80 years, but has now n ...

CODEX Entry 3440: Mt Hekla   Hekla had been dormant for at least 250 years when it erupted explosively in 1104, covering over half of Iceland with ash. This was the second largest eruption in the ...

CODEX Entry 3420: Royal Airforce Northolt   Northolt predates the establishment of the Royal Air Force by almost three years, having opened in May 1915, making it the oldest RAF base. During the ...

CODEX Entry 8110: The Golden Arc The largest known asteroid to hit earth, estimated at 15 km wide, struck the earth at what is now called Vredefort. What remains, the 30 km wide Vredefort dome is ...

CODEX Entry 1625: Manna   A yeast-like pellet that would go mouldy and inedible after 24 hours. It was round and looked like a coriander seed in shape, white like bdellium (Num. 11:7), and the ...

CODEX Entry 6016: Smallpox in Americas   Some believe that the death of 90–95% of the native population of the New World was caused by Old World diseases. It is suspected that smallpox was the c ...

CODEX Entry 9200: Bees   Remarkably little is known about the lifespan of solitary bees, of which there are 300 species. This is partly because they generally live underground. Estimates are that ...

CODEX Entry 5300: Roderic Borgia   In 797, Constantine VI, Roman Emperor in Constantinople, was blinded, deposed, imprisoned and replaced by his mother Irene. This coincided with a unification of ...