Exercise2A Page 114 Student A Lake Baikal, the deepest lake in the world, is home to a very unusual resident.0:00
The Baikal seal, or Nerpa, is the only species of seal that lives entirely in fresh water.0:14
It is thought to have lived in this lake in Siberia for 2 million years.0:23
No one is sure how it got there.0:27
One theory is that at some time Lake Baikal joined the sea and it came from there.0:31
Or it could have swum up streams and rivers to the lake.0:38
The Baikal seal is different from other seals.0:42
Adults are around one and a third meters long, making them the world's smallest seal.0:46
Their bodies contain larger than usual amount of blood, which makes them exceptional divers.0:50
They live longer than other seals too, reaching an age of up to 50.0:58
This unique animal still continues to survive in spite of being hunted.1:04
However, it needs all our care to ensure its future.1:08
Lake Baikal, the deepest lake in the world, is home to a very unusual residential.1:17
The Baikal seal, or Nurpa, is the only species of seal that lives entirely in fresh water.1:22
It is thought to have lived in this lake in Siberia for 2 million years.1:29
No one is sure how it got there.1:33
One theory is that at some time Lake Baikal joined the sea and it came from there.1:36
Or it could have swum upstreams and rivers to the lake.1:40
The Baikal seal is different from other seals.1:44
Adults are around one and a third meters long, making them the world's smallest seal.1:47
Their bodies contain a larger than usual amount of blood, which makes them exceptional divers.1:52
They live longer than other seals too, reaching an age of up to 50.1:58
This unique animal still continues to survive in spite of being hunted.2:03
However, it needs all our care to ensure its future.2:07
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