Author: Leah Rosenbaum / Source: Science News

Curl the fingers of your left hand over your palm and stick out your thumb like a hitchhiker.
Now, you have a rough map of Antarctica — with the inside of your thumb playing the part of the Larsen C ice shelf, says glaciologist Ted Scambos of the National Snow and Ice Data Center in Boulder, Colo.About a year ago, a massive iceberg roughly the size of Delaware broke off from that ice shelf, and it hasn’t moved much since (SN: 8/5/17, p. 6). The chunk of ice traveled just about 45 kilometers northeast before getting stuck behind an elevated ice…
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