1.   As glaciers flow into the water, the ice shelves grow until some point when a large iceberg breaks off, and then the process repeats.

2.   Ice shelves have grown and shrunk through the ages, mirroring the natural cooling and warming of the climate.

3.   Grocery store shelves are growing more empty each day as the transit strike hampers food deliveries and shoppers hoard basic food like pasta, flour and sugar.

4.   The process, he said, is part of a natural cycle in which ice shelves grow and then calve icebergs over geological time scales.