There is a fathomless black hole in the centre of South Africa, which the internet highway is yet to reach; but this is a good thing. That hole can be seen on the latest map that shows how internet access has grown across the globe.The black holes reveal where there is no or little internet. In the case of North Korea and Cuba the reasons for this are isolation and the oppression of freedom of speech. However, in South Africa, the black hole that covers the Karoo and the Kalahari is there because of the sparse population, and is one of the reasons this site was chosen for the Square Kilometre Array. Low population density means less light and less internet interference, which the telescopes need.John Matherly, founder of Shodan, a search engine for connected devices, explained on image-sharing website Imgur how he created the map using software that pings internet connected devices around the world, and waits for them to reply.Not surprisingly the highest density of internet connectivity is found in Europe and the US.But the developing world is also increasingly lighting up the map."If you look at Africa, it was dark in 2010, in 2013 it was lit up all along the coast."Now in 2016 the entire continent is lit up," said IT guru Arthur Goldstuck.In recent years another country that has experienced a dramatic increase in the level of internet connectivity is India. Goldstuck said cheaper data and connectivity was driving this growth, as was the recent proliferation of undersea cables providing cheaper access across the planet."Eventually the internet usage map will reflect the population of the world," said Goldstuck...