“The dirty little secret of genomics is that we still know next to nothing about how a genome translates into the particularities of a living and breathing individual.”

You Are Likely Part Neanderthal

My fascination with Neanderthals has to do with apparently being 2.8% Neanderthal myself (genetically speaking).

But then again, unless you are of a particular African descent, you most likely have Neanderthal DNA in you. Anywhere from 2%–2.8%.

Think about that for a second. A species that went extinct roughly 40,000 years ago is still swimming around in YOUR genome. At some point in deep history, Homo sapiens and Neanderthals were close enough to mate and produce offspring that survived. We are literally walking around with pieces of a ghost species inside us.

DNA is the code of biological life, if you don’t know. It is read and translated by the cells in your body to make pretty much everything that your body needs, whether still useful or not.

But How Did You Get It in You?

To understand how we got this DNA, I assume that it had to do with the constant impending wave of Homo sapiens onto Neanderthal territory.

As the Homo sapiens saw another species, they would simply attack, kill the men and children, and rape the women.

In some, if not most cases, they would also cannibalize their victims—we know this because some populations of humans have a protein that allows them to digest human flesh.

This was how societies were in the past… long moments of nothing happening, then brief moments of intense violence and rape, and then nothing again.

The other 99% of the time consisted of famine, disease, and early death.

Cheerful stuff, right? But this is reality. Thousands of years of it. And understanding that reality is what makes books like this so important — it strips away the comfortable myths we tell ourselves about human nature.

So It’s Very Difficult to Discover Ancient DNA

Neanderthal Man: In Search of Lost Genomes is an autobiography of one scientist: Svante Pääbo.

It’s his decades-long pursuit into figuring out how to discover the DNA code of creatures that have died tens of thousands to millions of years ago, but more specifically, the Neanderthal.

And when I say decades-long, I mean it. Pääbo started working on ancient DNA in the mid-1980s, when the technology was barely functional. Every bone fragment he tested was contaminated with modern human DNA — from the archaeologists who dug it up, from the museum workers who handled it, even from bacteria. The guy had to essentially INVENT the field of paleogenomics from scratch.

The breakthroughs didn’t come easy, either. He describes years of failed experiments, false positives, and moments where it seemed like the entire project was impossible. Then new sequencing technology would arrive, or someone on his team would develop a clever workaround, and suddenly they’d leap forward.

The Race to Sequence

One of the most gripping parts of the book is the competitive pressure. Pääbo wasn’t the only scientist chasing ancient DNA. There were rival labs, skeptical colleagues, and the constant threat that someone would publish first and steal years of work.

Science isn’t the calm, methodical process people imagine. It’s messy, political, and fiercely competitive. Pääbo doesn’t shy away from showing the behind-the-scenes drama — the funding battles, the personality clashes, the agonizing peer review process. It reads more like a thriller at times than a textbook.

And the ultimate payoff? In 2010, his team published the first draft of the Neanderthal genome. FORTY THOUSAND years after the last Neanderthal walked the earth, a team of scientists in Leipzig, Germany, reconstructed their genetic blueprint. That’s an incredible achievement by any standard.

As Detailed as You Can Get

Everything from dates, meetings, people, technology, scientific details, press releases, and even personal life details are revealed.

The amount of detailed information that is revealed from the chronological events, scientific discoveries, and trials is incredible.

Clearly, this book was written by a very studious and precise scientist (as they all should be).

I can’t say that every part of the book was easy to follow. Sometimes, the complexity overtook me.

The book felt as if it was written more for final-year high school students who have biology and chemistry training, or university students within the same majors.

But I loved how every detailed discovery and innovation in technology allowed the author and his team (and many other science teams) to take another step towards revealing the DNA of the Neanderthal.

What We Learned About Ourselves

Here’s what makes the book more than just a science memoir — the discoveries have REAL implications for understanding who we are today.

Neanderthal DNA in modern humans has been linked to immune system function, skin and hair characteristics, and even susceptibility to certain diseases. Some of these ancient genes helped our ancestors survive harsh climates. Others may be contributing to health problems in your body right now.

The idea that we carry functional genetic code from a species that went extinct 40,000 years ago is mind-blowing. Evolution doesn’t care about species boundaries the way we do. If it works, it survives.

What About a Bonus?

One thing that was perhaps missing was an epilogue, or even a chapter, on how the author would extrapolate the life of a Neanderthal and their eventual demise.

A conjecture section based on decades of learning everything there is about our ancestors would have been nice.

Pääbo is so disciplined about sticking to what the data shows that he avoids speculation entirely. I respect that as a scientist, but as a reader — come on, give us SOMETHING. After 300 pages of earning our trust, a chapter of educated guesses about Neanderthal behavior and culture would have been the perfect payoff.

Final Thoughts

If you are an aspiring scientist, have the spirit of a scientist (like myself), and are fascinated by one of our genetic ancestors, then this book is definitely for you.

It’s not a casual weekend read. The technical sections demand your attention, and Pääbo doesn’t simplify things just to be accessible. But that’s also what makes it trustworthy — you’re getting the real story from the person who lived it, not a watered-down pop science version.

For anyone interested in genetics, human evolution, or the sheer stubbornness required to push the boundaries of science — this is essential reading.

A++ read.