Over the South Pole

更新：2023-11-22

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[00:16.99]Lesson 43
[00:19.20]Over the South Pole
[00:21.67]In 1929,3 years after his flight over the North Pole,
[00:27.03]the American explorer R.E Byrd,
[00:30.67]successfully flew over the South Pole for the first time.
[00:35.09]Though,at first,Byrd and his men
[00:37.30]were able to take a great many photographs of the mountains that lay below,
[00:42.52]they soon ran into serious trouble.
[00:44.92]At one point,it seemed certain that their plane would crash.
[00:49.68]It could only get over the mountains if it rose to 10,000 feet.
[00:55.13]Byrd at once ordered his men to throw out two heavy food sacks.
[01:00.48]The plane was then able to rise and it cleared the mountains by 400 feet.
[01:06.62]Byrd now knew that he would be able to reach the South Pole which was 300 miles away,
[01:13.59]for there were no more mountains in sight.
[01:17.92]The aircraft was able to fly over the endless white plains without difficulty.
 
How was the plane able to clear the mountains?