Chapter 119 CO2

The scene in front of me is really unbelievable.

The key lies in the time when this mark appears.

I am confident enough to judge that this mark has just appeared, it is absolutely fresh, and it will not last more than a quarter of an hour!

There is something following us all the time, and it can draw modern symbols. More importantly, it is impossible to tell whether it is alive or not. This is really creepy.

What’s even more outrageous is that the mark on the sand figurine turned out to be two letters plus a number. Although the carving was crooked, it was definitely unmistakable!

co2, in the chemical formula this means carbon dioxide.

Phew!

The fat man shook his head and laughed out loud. It's an old thing that's thousands of years old. Isn't this an evil gate? Could it be that our ancestors are all gods? From heaven to earth, is it possible to know everything from ancient times to the present? Even the chemistry teacher's textbook w