2021 IN PICTURES
Ghost detector
LAKE BAIKAL, SIBERIA 13 MARCH
It may not be what you typically think of as a crystal ball, but this strange-looking clear sphere could help us see ghosts. Ghost particles, that is, otherwise known as neutrinos. It’s one of the optic modules being used in the Baikal-Gigaton Volume Detector – essentially a telescope made of eight vertical ‘strings’, each carrying 12 modules spaced 15 metres apart – being submerged around one kilometre below the ice of Siberia’s Lake Baikal.