EnvironmentCity in Sierra Leone covers buildings in mirrors to fight extreme heat People in Freetown, Sierra Leone, are increasingly exposed to extreme heat due to climate change and the urban heat island effect, but covering homes in a reflective film significantly cut indoor temperatures News
HumansA West African writing system shows how letters evolve to get simpler The characters used to write the Vai script, which was invented in Liberia in 1833, have become visually simpler over time, reflecting the evolutionary pressures acting on writing News