The iron in the Earth's inner core weakens dramatically before it melts, explaining the unusual properties that exist in the moon-sized solid centre of our planet that have, up until now, been difficult to understand.
The melting of sea ice in the Arctic is well on its way toward its annual "minimum," that time when the floating ice cap covers less of the Arctic Ocean than at any other period during the year.
Melting over the Greenland ice sheet has loudly shattered the seasonal record on August 8 - a full four weeks before the official close of the summer melting season.
Greenland's ice sheet is rapidly melting, but an international team of scientists say predicting its complete disappearance would be premature.
Himalayan glaciers aren't shrinking as fast as thought - indeed, some are actually growing.
The Greenland ice sheet appears more vulnerable to global warming than previously thought, and could disappear altogether if global temperatures rise more than 1.6 degrees Celcius above pre-industrial levels.
Greenland's bedrock rose by more than three quarters of an inch in some places, following 2010's major loss of ice.
The inner core of the Earth appears to be simultaneously melting and freezing, because of heat circulation in the rocky mantle that covers it.
Melting mountain glaciers are pushing up sea level rises faster than at any time in the last 350 years, say scientists - indeed, many are melting up to 100 times faster.
Climate change is destroying important archaeological remains that have been frozen for thousands of years, a study has shown.
Up to two-thirds of Earth's permafrost will probably disappear by 2200, say scientists, unleashing vast quantities of carbon into the atmosphere.
The water flowing from the North Atlantic into the Arctic Ocean is the warmest it's been in 2,000 years, say scientists.
The Greenland and West Antarctic ice caps are melting at half the expected rate, according to a joint US-Dutch team.