"But..."
After figuring out the intricate details of the situation, Fang Qiu then thought of the giant carnivorous lizard that lived over 50 years ago.
"What about those lizards?" Fang Qiu was confused.
Although the technology was not that advanced 50 years ago, the country must have assessed the situation prior to taking any action since they had already decided to do something to the underground cave. Otherwise, they would not have come to the conclusion that there were thousands of giant carnivorous lizards among them.
"Perhaps..."
Fang Qiu speculated, "The giant carnivorous lizards that lived over 50 years ago have been eliminated. The living Vigor Grass that grew in this underground cave was destroyed because of this. This Vigor Grass must have regrown in the past few decades."
