On the cover, we learn about the fall of Alphabet's Loon and those that hope to chart a future for stratospheric Internet. Elsewhere, we talk to 'father of the Internet' Vint Cerf and the ARPANET's Leonard Kleinrock about Delay Tolerant Networking and the quest to bring connectivity to the stars.

We also talk to the small team of volunteers rebuilding the influential EDSAC supercomputer, and visit the arguably more important ENIAC system.

Plus, we take a look at the world's most efficient data center, talk to Supermicro's CEO, hear how data centers can be used to grow lobsters, and a whole bunch more.