The Lyon hypothesis, nicely illustrated

Dang, I teach all this stuff about genes and chromosomes and epigenetics, but I don't have the advantage of giant floating holographic molecules floating around me. Maybe I'll have to steal this for my classes.


Although it could use some discussion of Blaschko's lines, to explain why you get a stripey pattern rather than just salt-and-pepper.

More like this

Like most people, I have my limits. Actually, I have a pretty high tolerance for tastelessness. It's a necessity in a world like this, where tastelessness increasingly goes beyond the pale.
Ken Ham is spluttering in indignation. It's wonderful. He's really peeved at the ABC News report because it mentioned a detail that is thoroughly trivial, but he claims is wrong.
I've been getting a lot of requests from people to talk about the recent Excel bug. For those of you who haven't heard about this, in Excel 2007, floating point calculations that should result in