An ice bridge linking a shelf of ice the size of Jamaica to two islands in Antarctica has snapped. Scientists say the collapse could mean the Wilkins Ice Shelf is on the brink of breaking away, and provides further evidence or rapid change in the region. Sited on the western side of the Antarctic Peninsula, the Wilkins shelf has been retreating since the 1990s. Researchers regarded the ice bridge as an important barrier, holding the remnant shelf structure in place.