Weddell Sea

Britain's polar research ship has crossed paths with the largest iceberg in the world — a “lucky” encounter that enabled scientists to collect seawater samples around the colossal berg as it drifts out of Antarctic waters, the British Antarctic Survey said.

One of the world’s largest icebergs is drifting beyond Antarctic waters, after being grounded for more than three decades, according to the British Antarctic Survey.

The genes of a four-million-year-old octopus species hold memories from the melting of a previous Antarctic ice sheet, raising fears of what another thawing could bring.