Improbable Destinies, Jonathan Losos

The question Losos asks, and tries to answer, is this: can we predict evolution? Are certain things inevitable in development — birds, humans, antibiotic resistance, etc, etc? He writes engagingly about field work, experiments, thought experiments, the various theories and people who have supported them… I definitely want to do more reading on this.

Am I convinced? Well, I’m not sure Losos is convinced that evolution can be predicted in detail; he presents some good evidence that suggests that you can predict the sorts of changes in gene function that will be beneficial in a certain environment, but that you can’t predict exactly how those changes will come about. Sometimes one gene might be altered, sometimes another. The phenotype is predictable (unsurprisingly: look for what would benefit the species in breeding successfully) but the genotype is not, unless it’s a fairly simple case of one particular molecular switch needing to be flipped on or off. There is a great deal of contingency in the process of evolution: Gould was (at least to some extent) correct in suggesting that we can’t “rewind the tape of life” and then see things proceed in exactly the same way.

As with determinism in any sense, I generally believe that if all factors were known, we would also know the result. I’m just not sure we can know those factors (and I dislike and squirm away from applying it to human ethics — our actions may be caused by previous events, but we don’t experience the process that way, so it’s irrelevant in how to be moral) — especially given events on a quantum level.

Rating: /5

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The Genius of Birds, Jennifer Ackerman

If you’ve read much about animal intelligence, most of the stuff in this book won’t be all that surprising, though of course since it’s entirely about birds, it includes a lot more anecdotes and bird-focused studies. As a whole, the book definitely makes a case for birds as specialised, well adapted, and very intelligent in their own spheres. We won’t be having philosophical discussions with them any time soon, though, if that’s what you thought ‘genius’ meant. And I think honestly that Ackerman makes less of a case for bower birds’ displays being art than others I’ve read.

It’s an easy read, and good for some ‘huh, cool’ moments, but not the most rigorous or unmissable popular science book out there.

Rating: 3/5

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The Gene: An Intimate History, Siddhartha Mukherjee

The Gene isn’t quite as great as The Emperor of All Maladies: the fact that this isn’t as much Mukherjee’s forte definitely shows, and there’s a couple of points of fact I’d quibble about. For the most part, though, it’s a really great discussion of genetics and the way they actually affect people, tracing a history of mental illness in Mukherjee’s own family as an example. I know this field pretty darn well by this point, and this is far from the first book I’ve read about genetics, but Mukherjee is a good writer, making it all seem fresh and worth reading even when it’s stuff I know backwards and forwards, and probably inside out too.

If you’re curious about genetics, about what genetics can do for us, and about how exactly things like recessive genes and pleiotropy work, this is a good choice. It’s not for experts, but it’s still a pleasant read even if you do know the topic already.

Rating: 4/5

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