Animals that have repopulated - 自然英语

In last week's episode I talked about the possibility of bringing back long lost animals from extinction, but this week I will talk about a more present issue that does not concern the prehistoric animals that have been lost to time. As the world’s climate changes, some animals are forced to adapt to their new habitat but for others, the decrease in their habitat is simply not sustainable and they are brought to the brink of extinction. However, due to conservation efforts there have been many species that almost vanished but have since repopulated. Sea otters are an extremely important part of their marine environments that they exist...