Development

Pharyngula

Category archives for Development

Oh gob, the stupidity. The latest wave of anti-choice legislation is based on one trivial premise: it’s got a heartbeat! You can’t kill it if its heart is beating! So stupid bills have been flitting about in the Ohio, Mississippi, Wyoming, Arkansas, and North Dakota legislatures trying to redefine human life as beginning at the…

My students are also blogging here: My undergrad encounters Developmental Biology Miles’ Devo Blog Tavis Grorud’s Blog for Developmental Biology Thang’s Blog Heidi’s blog for Developmental Biology Chelsae blog Stacy’s Strange World of Developmental Biology Thoughts of Developmental Biology Biology~ You really can’t teach a class by lecturing at them…especially not an 8am class. But…

My students are also blogging here: My undergrad encounters Developmental Biology Miles’ Devo Blog Tavis Grorud’s Blog for Developmental Biology Thang’s Blog Heidi’s blog for Developmental Biology Chelsae blog Stacy’s Strange World of Developmental Biology Thoughts of Developmental Biology Today was more context and a bit of a caution for my developmental biology course. I…

Science doesn’t say that!

Have you ever noticed how the religious regard ‘scientism’ and ‘reductionism’ and demands for concrete evidence as barely a notch above obscenities? That is, until they need to reduce complex issues to simplistic claims and don the mantle of Science to support their beliefs. Then they become Holy Writ. You can really see this behavior…

What I taught today

I was bad. I didn’t post my summary last week, so this is actually what I taught a week ago and what I taught today. Previously, I’d given an overview of the foundations of modern developmental biology in embryology and anatomy. I gave them more history last week, only not so ancient: what led to…

The best thing I’ve read today

I know it’s early, but I expect it to be the best thing for a few days yet. David Byrne writes about his love affair with sound, and I came away from it feeling like I’d both learned something new and that it fit well with other ideas I already had — it was a…

I am getting quite impressed with the progress being made in organ reconstruction. New techniques have allowed amazing improvements in bioengineering that allow whole complex organs to be grown in a dish and then surgically reimplanted — and much of this research is being driven by our military ventures, which provide a steady supply of…

How the turtle got its shell

In my post bashing that silly article claiming to have figured out how endoskeletons evolved from exoskeletons, there was a good question buried in the comments, and I thought I’d answer it. Are there any models pulled out of arses which explain the turtle’s unique skeleton? Yes! I mean, no, not pulled out of arses,…

Brains and beaks

I’m always telling people you need to understand development to understand the evolution of form, because development is what evolution modifies to create change. For example, there are two processes most people have heard of. One is paedomorphosis, the retention of juvenile traits into adulthood — a small face and large cranium are features of…

Vertebrates are modified segmented worms; that is, their body plan is made up of sequentially repeated units, most apparent in skeletal structures like the vertebrae. Arthropods are also modified segmented worms. Look at a larval fly, for instance, and you can see they are made up of rings stacked together. So here’s a simple and…