Ask an adult for their earliest memory and you will usually get something from around the age of three or four: a first day at preschool, the arrival of a…
Source: Wikipedia
The ancient city of Cyrene sat on the North African coast, in what is now Libya. Founded by Greek settlers in the seventh century BC, it became one of…
Picture the two places side by side. On one side of the Atlantic, the Sahara: the largest hot desert on the planet, stretching across the northern third of Africa, defined…
Source: Wikimedia Commons
There are landscapes that look like other planets, and then there is the Danakil Depression, which scientists actually use as a stand-in for one. It sits in the…
Look at Earth from orbit today and you see the famous blue marble: oceans, cloud swirls, green continents. Run the clock back roughly 700 million years and an observer in…
Source: Wikipedia
From ground level they are odd but unremarkable: bare, roughly circular patches of soil in dry grassland, each one somewhere between two and fifteen meters across, fringed by a…
