ancient history The Blinkerwall, a stone-age wall at bottom of Baltic Sea, could be Europe's oldest megastructure Rob Beschizza
Science NASA delivers first grant in 30 years to support the search for extraterrestrial intelligence David Pescovitz
aliens The best evidence for extraterrestrials may be their massive engineering projects David Pescovitz
science fiction Bruce Sterling on the next 50 years of climate-wracked maker architecture Cory Doctorow