Africa's past is the mildewed train station in central Addis Ababa, where locomotives sit gutted and rusted tracks vanish in the grass. The line was once the greatest in Africa; built by France in the 1910s, it ran more than 450 miles northeast to neighboring Djibouti, where the desert meets the sea.

Hong Kong-based company 300cubits is aiming to partially replace U.S. dollars in the container shipping industry with tokens soon to be launched on Ethereum - an open-source, public, blockchain-based platform.

Hyperloop One completed the second phase of testing its ultrafast transportation system - propelling an aerodynamic pod down a low-pressure tube at record speed and distance, the company announced last week.