Following an underwater volcano eruption on Saturday, Tonga has suffered significant damage and is blanketed in ash that closed runways and threatens water supplies.
Chilean scientists studying organisms in one of the most remote places on Earth are urging regional leaders to step up efforts to tackle climate change.
The massive Thwaites glacier in West Antarctica contains enough ice to raise global sea levels by 65cm if it were to completely collapse. And, worryingly, recent research suggests that its long-term stability is doubtful as the glacier hemorrhages more and more ice.
The Antarctic Circumpolar Current (ACC), the only ocean current that circumnavigates the planet, is speeding up. For the first time, scientists are able to tell that this is happening by taking advantage of a decades-long set of observational records.