According to “The Deep Ocean", what is one of the harsh conditions making deep ocean exploration difficult?

The air pressure makes this a difficult environment. The air pressure pushes down on your body. Also, people are building equipment that they want to use to do this job. Think about this though - how will they know if it will work unless they try it out? Someone could die - people have already died - trying to explore the ocean floor.

Explanation:

Most of the information available to read on this subject is going to tell you that the environment is harsh. The animals are different down there, and the temperature is a variable also. Keep researching - this is a great subject!

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