[contentcards url=”https://www.msn.com/en-us/weather/topstories/worlds-largest-iceberg-weighing-nearly-1-trillion-tons-runs-aground-near-sub-antarctic-island/ar-AA1AkHnM” target=”_blank”] Story by Abigail Adams The A23a iceberg is twice the size of Greater London, and slightly smaller than the State of Rhode…