“New” is a bit of an overstatement. It develops themes already covered in books like Nick Lane’s Oxygen (not exactly recent) and David Beerling’s The Emerald Planet; the main contribution to my understanding is a bit more depth on how oxygen and carbon dioxide have limited and unlimited life over the course of its development. The back emphasises the authors’ belief in panspermia, specifically in the form that states life on Earth was seeded from Mars, but there’s very little space devoted to that — and exactly zero actual evidence.
It’s mostly a reasonable read, if not at all “new”, but they badly needed some more time with an editor. They have odd repetitions, or places where they don’t define a word until long after its first use (not a problem for me, but possibly difficult for other pop science readers), and at times the grammar is just terrible. Sentences don’t have subjects, or the verb doesn’t agree, or… It’s not so bad that I’d call it a mess, but I was very conscious that they needed a proofreader or three to make their book feel more professional.
There were some interesting things in here, though: for example, a discussion of different types of lungs and breathing systems. I hadn’t seen that discussed before, and it was fascinating. And for dinosaur aficionados, yep, they definitely touch on dinosaurs and why they once ruled the Earth (and why, perhaps, that rule ended as it did).