Anita is supposed to look in the other direction. Not on the ground, but upwards, into space. From there, from the far reaches of the cosmos, all the particles that are interesting for astroparticle physicists usually come. That's why experts at Nasa have built Anita, a detector that floats on a balloon above the South Pole. But in recent years Anita (Antarctic Impulsive Transient Antenna) has discovered two mysterious particles that did not come from above, but from below, from the Antarctic ice. Perhaps there will be a banal explanation for this. So-called neutrinos, for example, which are almost massless elementary particles without an electrical charge, can cross the entire globe without ever colliding with an atom, and if chance so dictates, they will collide with one in the ice cap of the southern continent. In addition, there are masses of neutrinos, in every second billions of them fly unnoticed through every square centimeter of the earth's surface and also throu
