When sonar first picked up a massive, stair‑like object on the floor of the Baltic Sea, the image looked less like geology and more like a movie prop. The structure’s circular outline, sharp edges and ...

A new line of research proposes that the first clear signs of extraterrestrial intelligence may not come from distant stars, ...

New theoretical models have strengthened the case that immense, energy-harvesting structures orbiting their host stars could exist in principle in distant stellar systems. With the right engineering ...

The ‘Gardens by the Bay’ are home to 100,000 thriving plants–but for the entire setup to work, the designers had to figure out a way to protect the eerily-designed structures against the strong winds ...