For the first time, particle physicists have successfully used neutrinos to transmit a message from one place to another. Since neutrinos travel at (or near) the speed of light and can pass through just about anything, neutrino communication could potentially replace wires, Wi-Fi, satellites and everything else as the ultimate method of transmitting data.
The largest man-made structure on Earth is the Great Wall of China. The second largest is about to be the KM3Net neutrino detector, which will span several cubic kilometers under the Mediterranean, listening for whales. Oh, and looking for neutrinos. That too.
Here at Dvice we love giant science installations like the Large Hadron Collider, but who knew they had something nearly as awesome in Canada? This amazing looking sphere is is actually an observatory of sorts, although one that's more than a mile under the earth's surface.