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  4. Sylvia Earle
  5. Since the middle of the 20th century, more has been learnt...

Since the middle of the 20th century, more has been learnt about the ocean than during all preceding human history; at the same time, more has been lost.

Sylvia Earle
Ocean, Century, Lost
Since the middle of the 20th century, more has been learnt about the ocean than during all preceding human history; at the same time, more has been lost.