Losing glaciers | India’s Covid statistics | Singing blackbirds | Prime minister’s answers | Graces Jones’ perfect song The Klinaklini Glacier in Canada. A recent study has suggested that glaciers around the world are collectively losing around 267bn tonnes in mass every year. Photograph: Brian Menounos/Nature/PA The Klinaklini Glacier in Canada. A recent study has suggested that glaciers around the world are collectively losing around 267bn tonnes in mass every year. Photograph: Brian Menounos/Nature/PA Letters Sun 2 May 2021 11.29 EDT Last modified on Sun 2 May 2021 12.01 EDT The series of articles last week about vanishing glaciers has been both fascinating and alarming. But Gaia Vince’s poetic piece (28 April), with its echoes of Nordic myths, was almost out of this world. Worth the subscription on its own.