The world's largest iceberg, A23a, is stuck again. For more than 30 years, the giant frozen block — equivalent to the size of Rhode Island — was grounded on the sea floor in Antarctic coastal waters.

There is a moment each year when the Arctic stops reflecting light and starts holding it. It does not announce itself.

In the vast, swirling expanse of the North Pacific Ocean lies a phenomenon as intriguing as it is troubling – the Great Pacific Garbage Patch (GPGP). This colossal debris vortex stretching from ...