The edge of the old Earth has been fully formed, and the Old Earth, which was originally a protruding sphere, is now completely flattened. The continents and oceans are now on one large plane, and at the edges you can see the great chasm and the towering mountains that separate the Old Earth from the New World.

The edge of the old earth has an abyss tens of thousands of meters deep, and the sea water will fall from several gaps, but under the entire old world earth, there is a giant pillar with a diameter of tens of thousands of kilometers and tens of kilometers to support, and in this giant pillar, there will also be hollow channels under the action of negative pressure and underground pressure, a large amount of seawater will be pumped up again, thus bringing huge nutrients and replenishing the outflow of seawater.

The height of the edge mountains can reach tens of thousands of meters, and beyond the high mountains is an abyss that falls nearly 100,000 meters, and the abyss that is hundreds of kilometers wide is like a thin line, isolating the entire old world from the new world, which can be regarded as a protective line. There is also ecology in the deep ditch, but the creatures there are probably not ordinary humans who can fight against them.

The Sea Dragon and the Sea Demon Chapter are advancing to the underground world located below the deep ditch, and this world can lead to the old world. What humans don't know now is that inside the huge stone pillars that supported the old world, there were also mountains, rivers and oceans, and there was a special ecosystem of glowing algae, glowing plants, and even glowing lava.

Such a world is a layered world, and the final gateway is the old world at the top and outside. The huge crater of Skull Island is a small connection between the uppermost world and the old world—larger and more connected to the ocean, and some of the most dangerous mountains or lakes have small entrances and exits.

The sea water gushing out from the connection makes the sea thousands of meters or even tens of thousands of meters deep as if it were boiling a pot and stirring wildly, the situation on the sea surface is extremely bad, and the weather is also very violent due to the rising current, so these are dead seas, and normal ships will never enter.

The underground ecosystem also makes Hong Long feel really strange, many creatures are unprecedented, but without exception they are quite ferocious creatures - some big and some small, but they are all very fierce. Faced with a creature that dares to charge even the sea dragon, the result is naturally to become the food of the sea dragon.

The sea dragon now spends more time on land than in the water, his carapace prevents water loss, and his stronger limbs allow him to move quite quickly on land. In the Old World, humans were still conducting scientific investigations into the pits, and they had gone deep into the pits to a depth of kilometers.

The light here already comes mainly from some glowing algae, and the ecosystem has become very peculiar - the plants with long branches sticking out of the cave walls do not seem to need photosynthesis, and their leaves have become very small and purple in color - which was discovered by the light in the research room after being collected.

The current speed of the cliff activity laboratory is already very slow, because it is getting farther and farther from the surface, so it is necessary to build transfer stations to stock up on materials, and the terrain of the cave wall has begun to become more complicated, so the construction process has slowed down a lot. The phototaxis of the organisms in the depths makes it necessary for the laboratory to implement a strict shading system, not to let the light map to the outside - otherwise it is too dangerous, and the lighting is generally not used, using infrared lighting, using active infrared to observe the external environment.

Working noise is also a dangerous factor, but the sound of construction is unavoidable, so the laboratory once went up once, removing the ability to build tracks, and replacing it with a special unattended working track station with fully armored weapons, which is responsible for laying tracks below, and the laboratory works in a "safe space" more than 200 meters above, at most only responsible for the transfer of materials.

At each transport, the remains of the strange creatures that had been killed could also be collected, and they all looked rather terrifying - the ones who could attack the stations below that made sounds were undoubtedly predators. The most numerous of them are the lizards that have only two claws and exposed skull fragments on their heads that have appeared on Skull Island, and these creatures are about ten meters long, and they are not particularly large.

There were also some very large creatures that could have been bats of some kind, with winged hands that could stretch out six or seven meters, and were larger than humans, standing at a height of nearly three meters, with large ears and a mouth full of fangs—a mouth that could almost split the head in half, and the angle of opening was almost 180 degrees.

The eyes are also very large, so the creatures are able to rely on the faint light to search for prey, and most importantly, they are in groups. However, it is also relatively easy to deal with, stunting them with bright lights and plosive sounds, and then shooting them with bullets - these creatures don't have very developed standing hind limbs, at least not to fight with their claws like birds of prey.

And then there are all kinds of crawling flying big bugs, all sorts of strange things

Four thousand meters from the surface, the research station found that there was a light coming from the distance under its feet, which roughly seemed to be an area with glow below, and the brightness was quite strong, and it should be about ten kilometers away from the research station. The current situation is that when the wall of the cave reaches a depth of about 1,500 meters, it suddenly recess into the interior, which is equivalent to directly increasing the diameter of the cave several times.

This was a hassle to lay tracks, even the workstations and research labs had to be renovated, and there were many caves on the walls of the caves, out of which the lizards crawled out - and so did the other strange creatures.

The sea dragon meanders in a lake that is not without its fierce predators, but at the moment they are all hiding at the bottom of the lake or fleeing from the lake quickly, and the sense of power exuded by the sea dragon makes these creatures with keen sense know the importance of it, if they don't want to be food, it is better to hide.

And in the Old World, those inaccessible seas, the once exaggerated giant sea monsters in the waters of the Old World have disappeared over the years - whether it is a sea turtle or a great white whale, but now a huge tiger striped fish is wrestling in the sea. The giant tiger fish has spread to the seas of the entire planet, but the oldest tiger fish is still swimming in the waters of the Old World, it is also looking for traces of the sea dragon, and now it may have found information about the sea dragon, this giant tiger fish dived deep into the sea.