I read these sentences in a chapter in my book which was "Journey to the end of the Earth":
It's an immersion that will force you to place yourself in the context of the earth's geological history. And for humans the prognosis isn't good.
I don't know whether it is my bad habit or good that I am always keen to relate sentences to the premises before them. But I'm unable to relate these sentences with any logical sense. In the first, a description of something magnificent is given. But the second one with the word prognosis doesn't relate to the first for me. Prognosis means forecast and I wanna ask of what which I think is unclear from the first.