Science Week — #15

Imagine a 75,000-year-old forensic case: a Neanderthal with a puncture in the chest that looks like a spear wound. That is a startling place to start a week of science. This is episode 15, the science of the week for October 20. We’ve got deep time, living oceans, a planned mission to the moons of Mars, and even plastics doing unexpected chemistry at the water’s edge.

It’s a good mix of “wow” and “let’s read the methods.” We’ll look at what’s actually shown in each study, what’s still to be proved, and where the hype lines need guardrails.

Coming up: a necropsy confirms avian flu in a beloved bald eagle watched on a nest camera, corals that bounce back fast when paired with genetically identical neighbors, and a lab-built set of proteases designed to cut disease-related proteins. Also on deck: a potentially oldest shipwreck in the Mediterranean and a mission scheduled to scoop material from the moons of Mars. Let’s dig in.

The Neanderthal first. Researchers led by Emma Pomeroy and Chris Hunt say a 75,000-year-old skeleton from Shanidar Cave in Iraqi Kurdistan shows signs that a wooden spear was deliberately thrust into the chest, and that the individual likely died from a homicide.

The key word there is “likely.” The claim hinges on the morphology of a puncture. Earlier analysis of the same remains identified a 15 millimeter perforation. The new interpretation is that the location and shape are consistent with a spear driven with intent. But, Grace, we have to underline that this is still inference from a single skeleton.

Right, one case study from deep prehistory. Still, it’s a vivid insight into the social reality of Neanderthals. Not the cartoon caveman, but a person who lived and died in a community where conflict could turn lethal.

Exactly. What we can say is: the physical evidence supports a scenario where a wooden spear penetrated the chest. What we can’t say from this alone is why, who did it, or how common such events were. It’s a powerful data point, but it’s not a census of Neanderthal violence.

And it gives us that jolt of recognition across time: tool use, close-range confrontation, intention. That’s the kind of detail that collapses millennia into a single, human moment.

As always, replication is impossible in this context, but further comparative work on similar lesions, experimental reconstructions, and careful taphonomic analysis can strengthen or weaken the homicide interpretation. For now, “likely” is the right posture.

From deep time to a very modern pathogen. A necropsy confirmed that highly pathogenic avian influenza killed Jackie, a bald eagle seen through a live-stream nest camera near Big Bear Lake in California, reported by KSL News.

The necropsy earlier said the virus caused a severe stomach ulcer, internal bleeding, and bacterial sepsis. That’s a grim clinical picture. A necropsy is an animal autopsy—so this is a direct examination, not a guess.

It’s also a reminder that this virus can be devastating to wildlife. People felt connected to this eagle because they watched the nest live. That intimacy brings the biology home.

Important to note limits: this is a single confirmed case in an individual bird. We can’t generalize prevalence or transmission dynamics from it. The causation here—virus leading to ulceration, hemorrhage, and sepsis—is supported by the necropsy, but it tells us nothing about risk to humans or broader ecological impact beyond that event.

Still, it underscores what wildlife professionals have been confronting: avian flu is not abstract. It’s specific lives, nests, and communities watching.

The scientific takeaway is straightforward: highly pathogenic avian influenza can produce severe systemic consequences in birds, as documented postmortem in this case. Beyond that, we should avoid extrapolating without broader surveillance data.

Let’s talk medicine, or at least the molecular tools that might shape future medicine. A team at the University of Washington, led by David Baker, reports AI-designed proteases that can be programmed to cut specific disease-related proteins, with activity shown against targets associated with neurological disorders.

A protease is an enzyme that cuts proteins. The novelty here is design: using AI to engineer proteases that recognize chosen targets. The authors say they demonstrated activity against proteins tied to neurological conditions. That’s promising in principle.

It’s like moving from finding tools to crafting custom scissors. If you can snip the right protein at the right spot, you might defuse a problem upstream.

Methodology matters. From our summary, we don’t have details on whether this activity was shown in a test tube, in cells, or beyond. We also don’t see safety data, off-target assessments, or any in vivo outcomes. So we should treat this as an early platform result: a proof that design rules plus AI can yield proteases with intended specificity.

The direction is exciting, though. Targeted proteases are a very different lever than blocking receptors or boosting signals—they’re surgical.

Yes, and surgical tools require surgical scrutiny. Before clinical relevance, you’d want robust validation of specificity, durability, delivery to the right tissues, and the ability to avoid cutting what you didn’t plan to cut. The report builds on earlier de novo design work by the same team, but translation into therapy is a multi-stage path.

So, we can admire the craft and keep our feet on the ground. A neat blueprint in the lab, with a lot of careful steps ahead.

On to climate—and some conspicuously good news. Stanford University researchers showed that bleached coral fragments fully recovered within two months when placed in direct contact with genetically identical healthy corals.

The two key elements are “contact” and “genetically identical.” So this is not just neighborhood support—it’s matching tissue. In two months, “fully recovered” is the language used by the team for those fragments under those conditions.

It’s a quietly beautiful idea: a healthy part paired with a struggling twin, and the bleached one rebounds. Earlier coverage noted the same researchers had observed rapid healing of bleached tissue; now the formal study says full recovery in that time frame for fragments matched this way.

Caveats: we don’t have the sample size here, the environmental conditions, or whether this was in a controlled setting versus the open reef. Also, “fragments” tells us we’re dealing with small pieces, not entire reef structures.

Still, it points to the power of close contact with a genetically identical partner. It suggests a mechanism corals can use to share resources or integrate tissue when they’re compatible.

That’s the mechanistic hint. As for application, any scale-up would need to test durability over longer times, across species, and under real-world stressors. But taking bleached tissue to full recovery in two months under defined conditions is a strong headline within that boundary.

It’s hope, with footnotes—and I will take that any day.

To space: Japan’s space agency says the MMX spacecraft is scheduled to lift off on October 20, 2026, using an H3 launch vehicle, with a mission to retrieve material from Mars’ moons Phobos and Deimos.

A schedule is a plan, not an achievement, but it’s a significant plan. A sample return from the moons of Mars would be a notable addition to planetary science, offering physical material for lab analysis.

I like that it’s about moons that are right there in the Martian sky and yet so mysterious. Bringing grains back from Phobos or Deimos could answer basic questions about their origin.

And the vehicle named is H3, lifting from a space center in Japan. Again, this is forward-looking. It tells us intent and a target date. As with all complex missions, timelines can move. The scientific potential is huge, but until launch and cruise and rendezvous and return, it stays in the realm of planning.

Space is the ultimate “measure twice, cut once” enterprise—except you add “simulate it a thousand times.”

And then you update your models. For listeners, the message is: mark the date as an aspiration. If it holds, that’s when this sample story could start.

Back on Earth, and into the chemistry of the everyday: a study reports that common microplastics spontaneously generate reactive oxygen species at water interfaces. The authors link this to the polymers’ surface hydrophobicity and electrostatic properties, and they say it challenges the view of plastics as chemically inert.

Reactive oxygen species—ROS—are highly reactive forms of oxygen. The claim is that when these plastics sit at the water’s surface, their surface chemistry can kick off ROS generation without added reagents.

That phrase “spontaneously generate” is the eyebrow-raiser. We tend to think of plastic as the passive backdrop to the mess. Here it’s a potential actor.

Yes, though we should be precise. We don’t have rates, concentrations, or environmental impact data in hand. We just know that under the studied conditions, the interface itself can produce ROS, and this correlates with hydrophobicity and electrostatics of the polymer surface.

Hydrophobicity being the “water-hating” character of many plastics, and electrostatics the surface charge landscape.

Exactly. It’s a mechanistic study, and the significance is conceptual: “chemically inert” is not the whole story. Before jumping to ecological conclusions, you’d want to see how this plays out in natural waters, with sunlight, biofilms, and varying chemistries.

But it reframes the problem. The material itself may be changing the chemistry of the water it touches, not just sitting in it.

That’s the careful takeaway. It’s a challenge to assumptions that should provoke more measurement.

From micro to maritime history. Researchers led by Mehmet Nuri Ersoy and Hakan Öniz say they’ve dated a shipwreck off Turkey to roughly 2700 to 2400 BCE, potentially making it the oldest known wreck. Earlier reports described it as a 33-foot wooden vessel with well-preserved amphorae.

The “potentially oldest” phrasing is important. Dating in that range would indeed push the envelope, but it hinges on the methods used—again, not detailed here—and on broader comparative evidence. “Potentially” is cautious and correct.

I’m picturing the little wooden hull and those amphorae undisturbed on the seafloor. Even without knowing the contents, just their intact presence is evocative.

And the length—33 feet—gives a concrete sense of scale. Not a massive ship, but significant. As for confirmation, the community will want clear documentation of dating techniques and context. For now, we can say the team places it in that Bronze Age window and highlights its preservation.

It’s a small time capsule. If the dating holds, it would change the timeline of seafaring we can actually touch.

It’s the kind of claim that draws scrutiny, which is healthy. Either way, a well-preserved wooden hull with amphorae from that era is a valuable find.

Let’s tie some threads. This week, across wildly different scales, we saw how contact changes outcomes. A spear meeting a ribcage, perhaps fatally. A healthy coral pressed against a bleached clone, and life flowing back in. Plastics and water touching and producing reactive species. Even the planned mission is about contact in spirit: go to a moon, take a pinch, bring it home.

There’s also a recurring theme of tools and surfaces. A designed protease is a surface that recognizes a protein and cuts it. A microplastic bead is a surface that can alter interfacial chemistry. A ship’s hull is a surface that carried amphorae for centuries before resting on the seafloor. And a necropsy is a tool that turns observation into causation in a single animal’s death.

And meanwhile, a team looks at a tiny hole in ancient bone and reads intention. Another team looks at a tiny piece of coral and reads recovery. It’s a week of careful eyes and very specific claims—and that’s the kind of science week I like.

The caution flag is consistent: single cases, early-stage designs, planned timelines. The strength of a claim never exceeds its evidence. But each one opens a door for the next set of measurements.

And it reminds us that progress isn’t just big announcements. It’s the steady chiseling of detail, sometimes with a literal chisel on a fossil, sometimes with code designing an enzyme.

Plus the eternal lesson: nothing is truly inert when you look closely enough—not even plastic.

Or podcasters, apparently.

That’s our week. If you want the links, the context, and a smarter way to follow the stories and people you care about, head to factslane.com. In the apps on the App Store and Google Play, you choose the topics, people, companies, and places, and FactsLane keeps track with checked facts and clean updates.

And if you want more weekly signal with less noise, check out Good Week and Tech Week—sister shows that do for news and technology what we try to do here for science.

Thanks for listening. Stay curious, be kind to your future self, and we’ll see you next week.

Until next time.