Changes in Inheritable Traits

a.k.a. evolution.  It’s not all that scary or controversial until someone with a stake in your ignorance makes it that way.

From Understanding Evolution: “Unfortunately, many people have persistent misconceptions about evolution. Some are simple misunderstandings—ideas that develop in the course of learning about evolution, possibly from school experiences and/or the media. Other misconceptions may stem from purposeful attempts to misrepresent evolution and undermine the public’s understanding of this topic..”.

Download a pdf of this topic here.

or have a look at Berkley’s webpage here to understand some basic biology:

http://evolution.berkeley.edu/evolibrary/misconceptions_faq.php

Also, a very simplified explanation of how diversity and adaptation work:

Breaking News About Paleoindians at Clovis!!!

1936:

Portales Daily News.  Note that there was no “Clovis” cultural group yet…\

News1936-1jpgNews1936-2jpgClick HERE for the pdf, with bonus Coronado article OR link below:

http://theclovissite.files.wordpress.com/2013/05/pdn1936.pdf

Prehistory Day at the Blackwater Draw NHL

Prehistory Day was successful, due to an excellent turnout, helpful volunteers, and great weather.  A special thanks goes out to the members of Mu Alpha Nu and their friends for helping out again this year.  Nearly 300 people turned out for the event which lasted all day with people trickling in until we closed at 5:00.

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Chuck Hannaford discusses prehistoric tools and lifeways with interested visitors.

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Mary Weahkee demonstrates traditional yucca fiber working.

Demonstrations included fiber working, sandal making, flintknapping, and hunting techniques used by ancestral New Mexicans.  Discussions ranged from general archaeology to gourd canteens, stone tools, and prehistoric containers.

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Tommy Heflin teaches flintknapping to people of all ages and abilities.

The Portales flintknapping group, headed by Tommy Heflin, were a popular station at the event, helping create a new generation of flintknappers.

Every is attracted to the spear throwing range.

Everyone is attracted to the spear throwing range.  Isaiah Coan from the Office of Archaeological Studies was a great help with the kids.

The "touch-and-feel" tables create many opportunities for learning about the past and what it means to be human.

The “touch-and-feel” tables create many opportunities for learning about the past and what it means to be human.

From the abstract concept of "containers" as an artifact, a local boy learns about prehistoric life.

From the abstract concept of “containers” as an artifact, a local boy learns about prehistoric life.

Stacey Bennett shows her poster display created for the event.

Stacey Bennett shows her poster display created for the event.

We hope to keep the public outreach events a regular occurrence at Blackwater Draw.  Keep your eyes on the blog for future activities.

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Kids of all ages can get in touch with the past at these events.  Hope to see you here next year.

New Mexico Archaeological Council Newsletter

The most recent New Mexico Archaeological Council newsletter is out.  this issue focuses on Paleoindian archaeology and includes a short article of recent activities at the Clovis site.  Click here to download.  If you are a New Mexican, or have an interest in the archaeology of our fine state, consider joining NMAC.

2013-2
Paleoindian Archaeology in New Mexico
Contents:
In Memorium: Patrick Culbert
Introduction
Current Research and Investigations at Blackwater Draw, NM
Recent Research at the Mockingbird Gap Clovis Site
New Finds at the Water Canyon Paleoindian Site
Recent Paleoindian Studies at Spaceport America
Interpreting the Paleoindian Signature of Southeast New Mexico
Late Paleoindian Projectile Point Technology

First 2000 year long temperature reconstructions for individual continents

From the Archaeology News Network:

Past climate change varied remarkably between regions. This is demonstrated in a new study coordinated by the international Past Global Changes (PAGES) project, which reconstructed temperature over the past 1000 to 2000 years.

First 2000-year-long temperature reconstructions for individual continents

During the Little Ice Age between about AD 1250 and 1860 several cold relapses occurred, which stimulated artists to paint winter landscapes. The reproduced example was painted in 1601 by Pieter Brueghel the Younger, based on an older work by his father painted 1565 [Credit: Photo: S.U. Nussbaumer]

It is the first comprehensive temperature reconstruction on a continental scale. One of its main findings is that a general cooling trend, caused by different factors (e.g. orbital-driven insolation and changes in solar and volcanic activity), was ubiquitous across all continental-scale regions and was reversed by a distinct warm trend beginning at the end of the 19th century.

The scale of this project is impressive. Some 80 researchers from all over the world collaborated on the study, which has just been published in the scientific journal Nature Geoscience. In one of the widest-ranging efforts yet undertaken to reconstruct climate across the globe, the international author team evaluated data from all continents to track the evolution of temperatures over the past one to two millennia.

READ THE REST HERE…

Anthropology and Reporting

I feel we are in a constant struggle with BAD journalism… from the local paper to Smithsonian Magazine to the History Channel, we constantly fight to print real information.  Catch phrases, bad researchers, political lobbyists and other liars confuse the public and create a strange mythology about our past.  A small handful of “regulars” haunt the media with agendas having little or nothing to do with science.  I’m glad not to be the only one to notice the escalation of poorly written stories in the press.  Below is a lengthy excerpt from the Science 2.0 website:

The Top 5 Most Irritating Terms In Evolution Reporting

By Oliver Knevitt | April 17th 2013 01:59 AM

Evolution is misunderstood by millions.  And, it has to be said, a lot of the time, this problem isn’t helped by the way things are reported on the TV or in the news.

These are the 5 most common terms that, when I hear them used, I die a little. Though their effect is subtle, all of these terms perpetrate common myths about the way evolution works. The sooner they become extinct, the better!

1. Survival of the Fittest
Now, this term is something that often gets used synonymously with natural selection. In fact, it wasn’t actually coined by Darwin himself; it was first used by Herbert Spencer, though Darwin later came to use it extensively.

The problem with the phrase “survival of the fittest”, in my view, is that it rather misrepresents the way that selection really works. This is because it isn’t really the survival of the fittest organism that drives evolution. It’s the death of the least fit organism.

I can see how “survival of the fittest” appealed to victorian sensibilities! Instead of implying a brutal, red-in-tooth-and-claw vision of nature, it implies a striving towards self improvement. Which is, it has to be said, appealing. Unfortunately, it’s neither borne out by theory nor facts.

2. Living fossil
This is another very appealing term. Below was the best example I could find after a quick rifle through the drawers here in Leicester. It is a maple leaf next to a modernish mapleish leaf (sycamore).

It’s so appealing because for some so called living fossils really look like just that: like a sorcerer has breathed life into an inanimate fossil. Or that the fossil animal has been there all along, biding its time.

However, it just doesn’t reflect reality. No organism can survive without adapting. Yes, it may well be that their body form seems relatively conservative, but then, it is likely there is a lot of change that we may have missed.

I think it’s very improbable that the same environment would be around for hundreds of millions of years, and even more improbable that the same organism would be able to stay on top of the game for that long. Instead, these organisms have necessarily had to flexible; ready to adapt to the tumultuous changes in the environment over the aeons.

Richard Fortey advocates the term “survivors” instead; a much more preferable term. These animals are simply very, very successful, and are not some sort of dinosaur.

3. Missing link
This is undoubtedly the worst term in general use. There are many, many fundamental problems with this term, as I’ve written about before, but one the main problems is that a link implies a chain; a great chain of being, with the dumber animals at the bottom and clever man at the top.

Yet, there is a much deeper reason why I’d like this term to be dead and buried. It is entirely perjorative. It is only used by those wishing to deinigrate evolution. It automatically implies that we are involved in some sort of gigantic join-the-dots puzzle; that we spend our time desperately poring through rocks trying to find that one elusive crocoduck that will fill in our tree and finally legitimize our ill-conceived agenda.

The reality is that, if anything, it’s the other way round. We have far too many fossils and which ones are closer to the ancestral line and which are further is the tricky bit.

This is the one term that I am willing to issue a full, North Korea style, gagging order on. The main reason is that media reporting is obsessed with this idea. What we’re interested in is uncovering the history of life on Earth and understanding how evolution works. We’re not simply trying to prove that it happened.

In summary, we are not missing anything, and we’re not looking, thank you very much. 

4. More evolved/less evolved
I have to say that, in outreach work that I’ve done, I’ve succumbed to saying this. It’s just too convenient to say. Instead, however, I prefer the term basal. A lamprey is considered to be a more basal vertebrate than a human because it shares similar characteristics with what we expect the common ancestor of all vertebrates to have. We didn’t evolve from a lamprey; we share a common ancestor that is just as distant from lampreys as it is from humans, it only looks a lot more like a lamprey.

Strictly speaking, we are no more evolved than a lamprey. We are good at we do and lampreys are good at what they do.

5. Adaptation
Now, I’m sure that a lot of people will call me a pedant for disliking this term. The problem with using the word adaptation instead of trait or character is that it assumes that it got there via adaptionism.

It’s undeniably true that most important force that shapes the morphology of an organism is adaptation, i.e. evolving them so that they are better adapted to the task required. However, it is not the only force that shapes body parts or behaviours. Often, they are there because of constraints on evolution; they may arise simply in tandem with the evolution of another body part. So, I don’t like it because it makes us inadvertently make assumptions about the origin of any character of an animal.

Really, the people that ruined this term were evolutionary psycholgists, who, it’s fair to say, regularly take an overwhelmingly adaptionist view of the human body. The worst example I can think of is the hypothesis that women like pink because it is an adaptation to picking berries. By using the term adaption, it automatically implies that there must be a selective reason for this. Remember what I was saying about survival of the fittest? This is a perfect example of that being misapplied. It is not simply that those who preferred pink were more likely to survive to have offspring; it would necessarily mean that those who didn’t prefer pink would have to die. Which is… improbable, to say the least.

Read on here.

Rancho La Brea Photo Album

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Wandering scholars discover the Page Museum at La Brea Tar Pits.

Recent travels allowed for a quick visit to the Page Museum at the La Brea Tar Pits.  Now in their one hundredth year of excavation, the site has yielded over 600 species to date with a NISP of over 3.5 million (not counting over 200 bacteria).  It’s a remarkable place and I feel privileged to to have been given an excellent tour by Dr John Harris and Curator Gary Takeuchi.  Tar still bubbles and oozes and excavations continue, thanks in part to continuing growth of this highly urbanized area.

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Chuck and George with Dr John Harris and Gary Takeuchi

Although most of the tar seeps are closed off for safety, a couple can be accessed with a guide.  The surface is just as deceptive as it is described and is often covered with leaves and dirt.  The tar can also be deceptively solid feeling until the incredible stickiness locks your feet to the tar.  Dr Harris provided a great example by having us poke the tar with a wooden lath.  Even though it is solid enough to resist the lath for more than a top inch or two, it is extremely difficult to pull it back out again and it’s easy to imagine a hooved animal becoming mired almost instantly to await it’s demise by large cat or wolf or even thirst.

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You just gotta poke it with a stick…

For reasons that aren’t completely clear, there are an extremely high number of predators and scavengers in the mix, implying that many carnivores may be tempted by a struggling animal but the more cautious grazers were likely scared away by their thrashing comrades.  The upshot of this is an enormous number of coyotes, wolves, saber-toothed cats, short-faced bears, and American lions as well as the full gamut of vulture-like birds filling these pits and seeps.  Below I am holding the humerus of a Smilodon fatalis, a prevalent creature at the Tar Pits.

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Examining a freshly excavated smilodon humerus (upper arm of saber-toothed cat).

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Examining the mounted saber-toothed cats.

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And of course, a mammoth.

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A couple of mastodon.

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Just a glimpse of the over 3.5 million specimens housed at the Page.

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We had a wonderful tour of the “fish-bowl” lab by Shelly Cox.  Here we examine the newly cleaned mammoth tusk.

Tusks grow like tree-rings and tell scientists a lot about the environment the creature lived in by proxy.  A section of this particular specimen has been removed for analysis already.

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Cranium of a very familiar looking mammoth. Although not found inundated in tar, there is still enough in the sediment that it is oozing from the cleaned skull.

For anyone interested in Ice Age fauna, the Page Museum is a definite “must see” stop on the journey through life.

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Click the mammoth to see more from the Page Museum at http://www.tarpits.org.