文章列表

• 1.英语听力：探索发现 2012-10-21 长毛象王国 Mammoth—19
• They huddle and turn to face the threat, a giant short-faced bear. Faced by a wall of horns, the bear moves on to sniff out a less daunting meal. Occa...
• 2.英语听力：探索发现 2012-10-19 长毛象王国 Mammoth—18
• Away from the herd, the dominant male mammoth is distracted from his usual routine, today he has a more urgent priority than food, a younger challenge...
• 3.英语听力：探索发现 2012-10-17 长毛象王国 Mammoth—17
• Musk oxen and arctic hares are well-insulated against the cold as are the largest grazers of them all, the woolly mammoths. This herd is regrouping, r...
• 4.英语听力：探索发现 2012-10-14 长毛象王国 Mammoth—16
• But back then, they had serious competition from the giant short-faced bear. The short-faced bears bone chemistry reveals it was a carnivore and up to...
• 5.英语听力：探索发现 2012-10-12 长毛象王国 Mammoth—15
• For these baby animals, it was a race to grow up over the brief summer to be tough enough to face the winter. One young animal that died in its first ...
• 6.英语听力：探索发现 2012-10-10 长毛象王国 Mammoth—14
• Arctic ground squirrels hibernate like other small mammals, but with a unique twist. They can lower their body temperature right down to almost minus ...
• 7.英语听力：探索发现 2012-10-07 长毛象王国 Mammoth—13
• Small ears also help to minimize heat loss, the opposite effect of those huge heat-dispersing ears of their relatives, African elephants. Other Bering...
• 8.英语听力：探索发现 2012-10-05 长毛象王国 Mammoth—12
• The male flicks the air with his tongue to test if the ewe will accept him. The next stage of courtship is not so subtle. He gives her a kick. At this...
• 9.英语听力：探索发现 2012-10-03 长毛象王国 Mammoth—11
• At its maximum, the ice covered nearly six million square miles. And in places, it was up to two miles thick. The ice blanket was punctuated only by o...
• 10.英语听力：探索发现 2012-09-30 长毛象王国 Mammoth—10
• The fact that both horses and mammoths were here suggests these forests werent. It seems that, 14,000 years ago, Beringia was a huge expanse of open g...