Japan What happened to the 2.5 mile high building designed to be taller than Mount Fuji? Ellsworth Toohey

ancient history The Blinkerwall, a stone-age wall at bottom of Baltic Sea, could be Europe's oldest megastructure Rob Beschizza

astronomy Alien "megastructure" mystery deepens, but probably isn't a Dyson sphere 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

Science Are cosmic gorillas limiting our search for E.T.? David Pescovitz

Science "It's Never Aliens—until It Is" David Pescovitz