EARTH

摘要

A deal may have been done in Paris, but the seas will still rise by at least 5 metres, according to figures released in June. The main reason is the unavoidable loss of glaciers. Worryingly, this process is likely to accelerate as more ice is exposed to warmer temperatures. How quickly it might happen is still unclear, but it could be within a couple of centuries. Talk about a social network. The dolphins of the Bahamas hang out together and forge alliances - even though they belong to two distinct species. The Atlantic bottlenose and spotted dolphins have been seen foraging and playing together and even guarding each other's offspring. The males also group together to fight common foes, The discovery, reported in July, adds to the evidence that dolphin social ties are particularly sophisticated.