Customer Review

22 of 23 people found the following review helpful
5.0 out of 5 stars A fine balance, January 3, 2004
This review is from: Life on a Young Planet: The First Three Billion Years of Evolution on Earth (Princeton Science Library) (Hardcover)
Knoll provides what may be the finest description of the sciences of early life available. Bringing together such fields as geology, biochemistry, genetics and, of course, his own science of paleontology, he presents a vivid image of how life formed long ago. The subtitle is deceptively simple. "First three billion years" rolls off the tongue easily. Knoll demonstrates the quest to understand how life originated has been elusive and arduous. The search, he reminds us constantly, is far from over. We may not even gain meaningful grasp of the subject if we restrict the inquiry to this planet.
Knoll asserts the benchmark for comprehending how life may have started was the Urey-Miller experiments of the 1950s. By assuming a particular composition of Earth's early atmosphere and bombarding that recipe with electricity to duplicate lightning, Urey and Miller produced amino acids. Knoll credits these experiments not with showing how life began, but by their stimulation of much further research. Since then, geologists have revealed increasingly older rocks. Instead of buried deep beneath the surface as might be expected, they are often found well exposed. Knoll's expeditions to chilly Siberian sites are offset by the roaring desert of outback Australia. Both locations have provided researchers with new information on composition, chemical and environmental processes, and, most significantly, Precambrian fossils.
The many research fields now involved in developing a picture of life's beginnings indicate how complex a task unveiling "simple" can be. Early life, of course, was microscopic. Sometimes it isn't fossils that are found, but spoor remains - tracks once left in mud, images of forms, and, most intriguing for many, chemical signatures. The chemical, is usually carbon, that fundamental element of life. But other elements, iron, sulfur and oxygen also carry messages about living processes.
Knoll manages a delicate arabesque as he presents us with the evidence obtained and the interpretations derived from it. He carefully delineates the fossil information given by the rocks, mixing it with geological and geochemical processes. Various researchers are given voice through his narrative. Where issues are contentious, and most ideas of early life fit that description, he explains the reasons behind the stance, then offers his own choice. While the conflict is rarely solved, none of his solutions are arbitrary or based on personality. You are still left to satisfy your own mind through his references. Knoll's prose presents this information and discussion with clarity and balance. At the end, with these lucid explanations as background, he considers that answers to many of our questions may be found on our nearest planetary neighbour - Mars.
Beyond the informative text provided, Knoll enhances the book with site photographs to convey the scale of the locations excavated. Ancient landscapes are today stark, and the photos do little to convey the nippy Kotuikan cliffs or the roasting Precambrian site of North Pole, Western Australia. A collection of plates offers stunning colour images of ancient fossils and some modern equivalents. He further diagrams phylogenetic trees showing the relationship of organisms and why they are considered related. Not all life, he reminds us, has followed the path to complexity. With a good, but not exhaustive, reading list to examine, the reader may continue the pursuit. The younger reader may even wish to further the knowledge we have. Knoll exhorts the next generation of early life researchers to examine the questions and go afield to provide more answers. There are few worthier causes. [stephen a. haines - Ottawa, Canada]
Help other customers find the most helpful reviews 
Was this review helpful to you? Yes No

[Add comment]
Post a comment
To insert a product link use the format: [[ASIN:ASIN product-title]] (What's this?)
Amazon will display this name with all your submissions, including reviews and discussion posts. (Learn more)
This badge will be assigned to you and will appear along with your name.
There was an error. Please try again.
Please see the full guidelines here.

Official Comment

As a representative of this product you can post one Official Comment on this review. It will appear immediately below the review wherever it is displayed.   Learn more
The following name and badge will be shown with this comment:
 (edit name)
After clicking the Post button you will be asked to create your public name, which will be shown with all your contributions.

Is this your product?

If you are the author, artist, manufacturer or an official representative of this product, you can post an Official Comment on this review. It will appear immediately below the review wherever it is displayed.  Learn more
Otherwise, you can still post a regular comment on this review.

Is this your product?

If you are the author, artist, manufacturer or an official representative of this product, you can post an Official Comment on this review. It will appear immediately below the review wherever it is displayed.   Learn more
System timed out

We were unable to verify whether you represent the product. Please try again later, or retry now. Otherwise you can post a regular comment.

Since you previously posted an Official Comment, this comment will appear in the comment section below. You also have the option to edit your Official Comment.   Learn more
The maximum number of Official Comments have been posted. This comment will appear in the comment section below.   Learn more
Prompts for sign-in


Sort: Oldest first | Newest first
Showing 1-1 of 1 posts in this discussion
Initial post: Nov 20, 2011 4:26:50 AM PST
Tero says:
I agree. But not reading biology on a routine basis made reading a bit of a work. I was not up to it. Read parts I could quickly grasp.

I ended up reading about 50-70 pages of it. The animals prior to the Cambrian are not particularly interesting, but they do seem to have invented the sort of life we know. Hox genes and so forth. They were not particularly mobile.

The physical evidence of life is well covered. There is also some coverage of geology, snowball earth etc.

The Cambrian is also discussed in broad terms, mostly to see how it connects to precambrian. Terms like bilateral come up and are tracked through to arthropods and chordates.

Reads much like a college text. I did not get paid to study it so I skipped a lot. The point he makes about the Cambrian "explosion" you have to read there, I can't briefly summarize it. Other than the speed of evolution was reasonable. Hox genes and mutations of these made the explosion possible.
‹ Previous 1 Next ›

Review Details


4.6 out of 5 stars (36 customer reviews)
5 star:
4 star:
3 star:
2 star:    (0)
1 star:    (0)
Used & New from: $6.67
Add to wishlist

Location: Ottawa, Ontario Canada

Top Reviewer Ranking: 61,116