By using five microphones, a speaker, and a sophisticated new echolocation algorithm, researchers have successfully built a full 3D image of a cathedral’s insanely complex interior. The same technology could someday allow humans to navigate in total darkness.

Mexico's active Popocatepetl volcano erupted yesterday, spewing ash and incandescent rock almost three miles high. And as you'll see in this dramatic video, the explosion produced a massive shockwave — sending huge chunks of burning debris to the surrounding areas.

A central theme of the recently concluded GF2045 Congress was the idea of achieving a kind of immortality by transferring our minds to avatars or robots. Indeed, as Japanese professor Hiroshi Ishiguro’s presentation clearly showed, our robotic doppelgangers will truly be made to look and act like the real thing.

Many of us are familiar with the Pengaton's Cheetah robot — the world's fastest mechanical mammal. But that feline brute is rather big and, well, even a bit severe. Thankfully, there's now a kinder, gentler version — the cheetah-cub robot.