With the way that humans had been conquering nature, virgin lands, unclaimed by humans, were becoming fewer and fewer. Even the African rainforest and the Amazon rainforest were dwindling in size as the days went by and, every day, a new animal species ceased to exist. Although on land, there were still species that had yet to be discovered by humans. The main focus was all on small animals, such as arthropods. As for large animals, there weren't many left that had not yet been discovered.
But the ocean was different.
About 70% of the Earth's surface area was covered by the ocean, and, hiding within the blue ocean, was a large number of unknown, mysterious creatures––especially the mysterious, deep-sea organisms that were beyond human imagination. Scientists have pointed out that human understanding of the deep sea was not even close to the little knowledge they had about the surface of Mars.
Zhang Zian understood what Reina meant.
