The cause of an explosion over a hundred years ago remains a mystery even to scientists of the current century. However, Shen Yue knew that over the years, scientists have made many "scientific" assumptions regarding the Tunguska explosion.
After all, assumptions cost nothing.
Rigorous science can sometimes be used for chit-chat too.
In these assumptions, theories that put the blame of the accident on aliens take the upper hand.
Shen Yue didn't believe in ghosts, but he did reserve his judgment about the existence of aliens. After all, Earth is just a speck in the vast cosmos. Just because earthlings can't see aliens doesn't mean that aliens can't see earthlings.
Upon hearing Jessica's argument, Shen Yue echoed, "What you say could be possible."
"You're quite open-minded."
Jessica, pleased by his approval, continued, "That's why I think the earthquake here was also caused by aliens."
Shen Yue was taken aback.