The history of life is punctuated by major transitions and inventions: fish that moved onto land, reptiles that turned into birds. But how did these happen? In Some Assembly Required, Professor of Organismal Biology and Anatomy Neil Shubin provides an up-to-date and utterly engrossing account of the latest thinking on the great transformations in evolution. And he has one clue for you: nothing ever begins when you think it does…
Most people will at least be mildly familiar with the story of how the structure of DNA was discovered. Francis Crick and James D. Watson are household names in this story as they went on to win a Nobel Prize. But can you name the third person to share it with them? Most people will also have heard of Rosalind Franklin, but as Gareth Williams shows, so many other people were relevant to this story. Watson and Crick only put the finishing cherry on the cake. Unravelling the Double Helix covers the preceding 85 years of breakthroughs, blind alleys, near-misses, and “beautifully executed bellyflops” by some of the greatest scientists of their time.
The subtitle of this book points to an observation that most biologists will anecdotally agree with. Looking at the long sweep of evolutionary history, there is indeed a clear overall tendency for life forms to become more diverse and complex. Daniel W. McShea and Robert N. Brandon, the one a biologist with a secondary appointment in philosophy, the other a philosopher with a secondary appointment in biology, here declare it the Zero-Force Evolutionary Law or ZFEL. But is this a law of nature? And does it really differ from stochastic processes or even entropy?
Since being released on the world in 2012, the biotechnological tool CRISPR has been making headlines. Biologists used to rely on the relatively blunt tools of genetic modification, but this new tool is so precise and versatile that they now speak of gene editing instead. For people in a hurry, Nessa Carey here provides a primer on the powers and pitfalls of gene editing. Hacking the Code of Life is accessible to readers without much background in genetics, focusing more on the applications and the questions it raises than the nitty-gritty details of the tool itself.
In my recent review of She Has Her Mother’s Laugh: The Powers, Perversions, and Potential of Heredity, I mentioned how the concept of heredity has become ever fuzzier the more we have learnt about how traits can be passed to the next generation. We have come from a very gene-centric period in biology, but biologists Russell Bonduriansky and Troy Day are ready to shake up the field. Neither a Lamarckian redux nor an attempt to downplay the importance of genes, this book successfully argues that the time has come to take into account non-genetic forms of heredity. Along the way, they provide a very interesting history lesson on how we got here in the first place.
As one of several intellectuals who wrote about evolution before Darwin, time has not been kind to the French naturalist Jean-Baptiste Lamarck (1744-1829). Reviled during his lifetime by the influential Cuvier, after his death he became best remembered, and ultimately ridiculed, for the idea that characters acquired during an organism’s lifetime are passed on to its offspring. With the rise of the modern field of epigenetics, some of his ideas are making a comeback, albeit modified and adapted for the 21st Century. Palaeontologist and astrobiologist Peter Ward would even like to go so far as to restore some honour to his name and consider epigenetics a neo-Lamarckian process.
After I read and reviewed Who We Are and How We Got Here: Ancient DNA and the New Science of the Human Past, I thought I knew about the changes to the story of human evolution based on studies of DNA. And given that Ancestors in Our Genome was published a few years before that book, I was curious what it could add to what I had been reading so far. As it turns out, a lot. As with my previous review, I should preface this one with the same warning that things are about to get complicated…
When I opened this book and read its sales pitch (I paraphrase: “What if I told you of a new fortune-telling device that can predict psychological traits – it’s called the DNA revolution!”) I raised my inquisitive but sceptical eyebrow somewhat. Did I just pick up another piece of pop-psychology pulp? Oh boy, was I wrong! Behavioural geneticist Robert Plomin has written an incredibly interesting book with Blueprint, explaining how rapid advances in DNA sequencing technology are opening vast new vistas on the genetics underlying psychology. And is it ever so different, and more complex, than what hyped-up newspaper headlines have tried to sell us so far.
This review is part of a double bill. Cold Spring Harbor Laboratory Press recently published How Scientific Progress Occurs: Incrementalism and the Life Sciences. In it, Elof Axel Carlson explores the relevance to biology of the ideas Thomas S. Kuhn formulated in his book The Structure of Scientific Revolutions. Having read both books back-to-back, this review follows on the one of Kuhn’s book.