A structure that will soar taller than the Burj Khalifa and lay claim to being the second-largest structure ever built in the history of mankind, right after the Great Wall of China.
The KM3Net neutrino detector, which will span several cubic kilometers under the Mediterranean sea, looking for neutrinos.
Neutrinos (meaning “small neutral one” in Italian) they are little subatomic particles that aren’t electrically charged, meaning that they can pass straight through atoms without even noticing.
Most neutrinos passing through the Earth emanate from the Sun. About 65 billion (6.5×1010) solar neutrinos per second pass through every square centimeter perpendicular to the direction of the Sun in the region of the Earth.
The only way we can directly detect neutrinos is when they get unlucky enough to run into the nucleus of an atom, which doesn’t happen very often. Detectors make up for this by being very large.
KM3Net will consist of three cubic kilometers of 37,000 individual neutrino sensors under 3,200 feet of water.
read more: popsci