* Astronomy

Mauritania's second city, Nouadhibou, is a strange frontier town that feels like the end of the world.
In the market you can buy anything from chickens and goats to traditional herbal remedies and magic potions.
But perhaps the weirdest objects of all on sale are meteorites, some of the rarest rocks on earth that land from space in the wastelands of the Sahara desert.

Read more