It’s too cool a concept for accuracy to matter. Further to “Remember the ‘developmental hourglass’? Well, not so fast,” Jonathan Wells writes to point out that vertebrate embryos more closely resemble each on another than do their adult forms only if one carefully cherry-picks the desired stages, which are long after the beginning of development. In Read More…
Embryology
Remember the “developmental hourglass”? Well, not so fast.
“The hourglass model of embryonic evolution predicts an hourglass-like divergence during animal embryogenesis – with embryos being more divergent at the earliest and latest stages but conserved during a mid-embryonic (phylotypic) period that serves as a source of the basic body plan for animals within a phylum.” Well, not so fast: From Hajk-Georg Drost, Philipp Read More…
2018 March for Life in Washington, DC: 45th annual response to the 1973 Abortion on Demand US Supreme Court Decision
Today is the March for life in Washington DC. Speakers include: Rep. Paul Ryan, Pam Tebow, Matt Birk and others. We have someone on the ground from the UD family and will be giving updates as we get them across the day. Remember, globally, the abortion holocaust toll rises at a million or thereabouts per Read More…
Stuff Doesn’t Evolve–It Just Shows Up in the Beginning
Here’s a news article from Phys.Org on a lamprey study. Actually it’s a study concerning phylogenetics and using gene regulatory mechanisms to figure out the relationships that exist. It turns out that in the lamprey, which is part of the Cambrian explosion, the same kind of hind brain gene regulatory mechanisms are in place as Read More…
Developing embryo’s “rosette” new to science
Researcher, ” … it’s fascinating how beautiful we are then, and how these small cells organise so perfectly to allow us to develop.”
“The Hox clock is a demonstration of the extraordinary complexity of evolution”
“This system is the first “mechanical” clock ever discovered in genetics. And it explains why the system is so remarkably precise.”