Grönland tappar närmare 30 miljoner ton is – varje timme. Enligt forskarna bakom en ny studie kan det innebära att Grönlands istäcke har nått en oåterkallelig brytpunkt.
In several colonies of emperor penguins, almost all the chicks died when the sea ice in Antarctica melted last year. - They probably drowned, or floated away on ice floes and starved to death when their parents couldn't find them, says researcher Norman Ratcliffe.
