Caves
Caves can be comfortable homes for humans. There is much evidence to show that humans have been living in caves since prehistory. Caves provide shelter, protection and defence. They can also be warmer than cooler outdoor weather and cooler than hot temperatures outside.
However, caves can also be very dangerous. Here are some reasons why:
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However, caves can also be very dangerous. Here are some reasons why:
- The deeper you go into a cave, the darker it gets.
- It is very easy to become lost.
- There are drop-offs, and it is easy to get injured.
- Caves can become extremely hot or extremely cold.
- Caves can flood while people are inside.
- There are narrow spaces and waterways that are extremely dangerous.
- Oxygen may become sparse deep inside caves.
- There may be poisonous insects and diseased bats that can bite (cave-dwelling animals are called troglobionts).
- Some bacteria in caves produces strong acidic gases that are damaging to human lungs.
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