From the Telegraph‘s “travel” section, we have 26 gorgeous pictures of Africa from the air, taken by Martin Harvey. I’ve chosen seven to show here, but go to the link to see them all. (Click those below to enlarge.)
Lake Turkana, shown below, was once the site of a paradigmatic example of “punctuated equilibrium” taken from data on fossil molluscs. Those of a certain age may remember this assertion, but the “punctuated change” now appears to be an artifact of invasion from other places.
h/t: Matthew Cobb