Massive iceberg breaks off from Canada's glacier
A massive iceberg recently broke off from Canada's Porcupine Glacier and is claimed to be the "biggest calving event" in North America in last three decades. Estimated to cover around 2 square kilometres, the iceberg is currently floating in British Columbian ice-fields. Notably, Porcupine Glacier has been thinning at a rate of around 2.5 inches per year.