Of course I know there is a floating plastic island the size of Texas in the North Pacific, formed from our (my) trash moving with ocean currents. (nwei.org)
Scientists have documented this transition before: In 2002, a Rhode Island sized chunk of ice calved from a different ice shelf, Larsen B, along the Antarctic Peninsula (SN: 10/18/14, p. 9). (sciencenews.org)
Thanks to a combination of diminished island size, rising temperature and perhaps the animals themselves causing erosion and fouling their own water, the mammoths died of thirst. (discovermagazine.com)