I'm an anthropologist and the whole H. naledi thing is wild. highly agree that the netflix documentary (unknown cave of bones) isn't worth watching. The timing between his paper (NOT peer reviewed! every credible journal he submitted it to rejected it) and the release of the docu shows very clearly that they were already producing it before he'd officially published anything. and then he sent some of the remains to space as a publicity stunt so fuck you if you wanted to do any genetic testing on them or anything, solar radiation is a hell of a beast. I hope he's remembered as a laughingstock and a sham for this, discovering Au. sediba does not excuse his current blatant disregard for science š¤
i knew things were generally bad prior to reading this but houghh my god yoU GOTTA BE SHITTING ME
bro needs to put on his clown nose and little squeaky clown shoes and honk his way outta town
I am forever going to be furious that holotype material of human ancestors got shot into space. That's global heritage, not a toy for billionaires! But there's something a lot more insidious there, too.
We do not have a lot of hominin material! There are some species we know from a handful of teeth and finger bones. There are two partial skeletons that make up the entire A. sediba fossil record. Most fossils do not leave their home region because it's considered unsafe to risk them to travel. It was a huge deal back in the mid 2000s when Lucy went on tour because that was the first time that fossil had left Ethiopia; even professionals at the Smithsonian, the only museum in the US to have any non-human hominin fossils on permanent display (the specimen is a partial Neanderthal) were deeply concerned about the risk posed to the fossil.
And that was just international travel. They put Sediba and Naledi in space. (Well, low Earth orbit.) At the whim of the billionaire who bought the land they were discovered on. This wasn't a case of letting more of the public see an ancestor, this wasn't an activity done for scientific study, and it does nothing to support a better understanding of human evolution. So what was the point? Publicity? Attention? Did money change hands, and where did it go? Did it go to the institution that houses these fossils? Did it go to the people who live there today? Did it go to Lee Berger himself? Who made money from letting a billionaire pay to play with these fossils, who made money from letting them be risked like that? The transparency surrounding this choice was completely nonexistent, and for Berger to be as highly supportive of the plan as he was... It's alarming.
That said, they're fossils, so genetic testing was never an option. In a fossil, all organic material has been replaced by inorganic minerals. Subfossils that still have organic material remaining can sometimes be tested, but the material that got launched into space was not.
However, there is a kind of testing that exposure to ionizing solar radiation could fuck up, irrevocably.
Dating.
Our methods for precisely dating fossil material rely on elemental decay. There are careful calibration curves that are used to account for fluctuations in atmospheric radiation, nuclear testing, and more. That material that was taken to space can never be tested, and while yeah, there's other material from the same fossil that could be tested, again, we have two specimens of A. sediba. Two.
Destructive analysis is often scientifically necessary and valid- but we learned nothing from sending these fossils into low earth orbit. There was no public information, no net good here. Was anybody inspired by this? What, other than Berger's PR campaign for naledi, was the point? Was the active destruction of potential scientific information worth whatever justification they had for sending that material to space?
Wife how have I not heard of this until now?
I don't have an answer for you, sweetie, bc I'm now trying to figure out how tf *I* hadn't heard about this before...
Like.... jfc. Hominin fossils just.... Should NOT be goddamn toys. As stated, we do NOT have a whole lot of hominin material. Like, if you take out A. afarensis, H. neanderthalensis, H. erectus and early H. sapiens, you could fit most of the remaining fossil material in the trunk of my goddamn Honda Civic.
We cannot be fucking around like this, ffs. Especially ESPECIALLY with holotypes and paratypes.
(Though I do want to clarify one thing, since biochem/genetics/molecular bio is my jam... A. sediba is definitely Too Fucking Old to get genetic material out of, but H. naledi may not be. And you CAN get genetic material from true fossils- there are forms of organic material that are not generally targeted by the mineralization reactions involved in most fossil formation. The limiting factor, however, is that DNA has a half-life, and anything measured in millions of years old instead of tens-of-thousands is DEFINITELY too old. Naledi is in the grey area of hundreds-of-thousands of years old, where getting usable genetic material out is theoretically possible, just REALLY fucking difficult and success is based heavily on luck and the exact taphonomic processes that preserved the fossil in question.
But, like, organic material definitely exists in true fossils. I mean, fucking cholesterol has been extracted from *pre-Cambrian* fossils- it's why we know Dickinsonia was almost certainly an animal, bc the fossils contain animal cholesterol, not plant or protist cholesterol.)
























