Uncommon Descent Serving The Intelligent Design Community

sexual selection

Woke world destroys Darwinian evolutionary biologist

Those other evolutionary biologists had better get with the program and denounce Colin Wright, right? Or just shut up and stay shut up. From an old source: Sow the wind, reap the whirlwind. We’d be happy to help but we can only help people who think that intellectual freedom is not negotiable. It must be okay to criticize Darwin too. Read More ›

Rob Sheldon on Darwinism and the problem of why intelligent women marry less intelligent men

If regression toward the mean is a nearly universal tendency, how could evolution proceed via sexual selection? Outliers would tend to get reabsorbed far more often than not. Read More ›

More on male vs. female body form and Darwinian sexual selection

Nelson: There is no evidence to support the assumption that mechanically efficient bipedal walking requires a narrow pelvic morphology. If there are metabolic costs to walking and running with wider hips, they could be offset by subtle changes in movement patterns. Read More ›

Rob Sheldon offers some thoughts on the recent challenge to Darwin’s sexual selection

Sheldon: Finally, somebody is saying what ID has claimed for decades--Darwin has no clothes. It's just-so stories stacked on just-so stories with the very thinnest of experimental evidence. And that's the only thing I admire about post-modernists. Read More ›

Paper: So many exceptions to sex chromosome evolution

From the paper: “Finally, the remarkable turnover of sex chromosomes in many systems, as well as variation in the rate of sex chromosome divergence, suggest that assumptions about the inevitable linearity of sex chromosome evolution are not always empirically supported, and the drivers of the birth-death cycle of sex chromosome evolution remain to be elucidated. ” Read More ›

Claim: Sexual selection could spark new species

Of course, sexual selection could spark new species. Lots of events could. At least in theory. The problem is, it must persist generation after generation to make and maintain a difference. How often can it work that way unchecked in an ecology where a great many other shaping events are happening at the same time? Read More ›

Symbiotic bacteria help frogs find mates (but the real story is all the wrong assumptions we make)

Contrary to assumption, 1) smell was important in locating mates and 2) males and females had different smells 3) produced by symbiotic bacteria. One wonders how many other life forms would challenge simple evolution tales if they were closely studied. Read More ›

Researchers: When mates are rare, birds help their parents raise more offspring

Male birds are more likely to do so: After a five-year experiment, researchers from Florida State University and the Tallahassee-based Tall Timbers Research Station found that when fewer mates were available for brown-headed nuthatches, these small pine-forest birds opted to stay home and help their parents or other adults raise their offspring… Associate Professor of Biological Science Emily DuVal and Jim Cox, a vertebrate ecologist from Tall Timbers and a courtesy faculty member at FSU, had long been interested in how these tiny birds showed cooperation—that is often having non-breeding young adults hang out and help raise chicks. After all, bypassing the chance to reproduce is not typically how nature works… This was the first large-scale, experimental evidence that the Read More ›

Birds are found to plan like humans for their offsprings’ future

Popscience: No natural mechanism is remotely suggested, so we must assume that it is sheer mental power, of the sort that we species-ists once thought existed only in humans, that enables the hen bird to plan for her chicks' future. Shame on us! Read More ›