John Gurche is a "paleoartist" who reveals the faces of our ancestors for the Smithsonian National Museum of Natural History's Hall of Human Origins. (National Geographic)
On February 4, Bill Nye "The Science Guy" will debate Ken Ham, Creation Museum founder and Answers In Genesis president/CEO, at The Creation Museum in Petersburg, Kentucky just across the river from Cincinnati, Ohio. The event is titled "Is creation a viable model of origins?" This is gonna be good. Tickets are $25 from the Creation Museum. I hope the museum makes a full video available but I bet that will depend on how it plays out. Hopefully an audience member will record and post the whole thing online. "Bill Nye to Visit Creation Museum for Debate" (ABC News, thanks, Bob Pescovitz!)
(image: CC-licensed photo of Creation Museum exhibit by Anthony5429)
Say dragons did exist. In that alternate universe, how would they breathe fire? (Where the answer is not "magic".) Kyle Hill has a nice explanation for how real-life fire breath might work
, and how it could have evolved over time. (Although, slight spoiler, Hill's idea won't be terribly surprising to those of us raised on Ken Hamm Creationism videos.) — Maggie
Ember the platypus has no stomach. But there's nothing wrong with her. No platypuses have stomachs. They're just one of a surprising number of vertebrate species that have evolutionarily jettisoned their stomachs, in favor of a straight-shot digestive tract that directly connects the throat to the intestines.
How can a mild-mannered grasshopper turn into a ferocious locust? Why are humans humans when we have share 80 percent of the same genetic material with a cow?
In a fascinating long read at Aeon, David Dobbs delves into the differences between genetic change (evolution as you probably learned it in school) and genetic expression (the amazing powers of natural selection that scientists are only now starting to really understand). — Maggie
From beer to coffee, bitter flavors are things that most of us have to learn to enjoy over multiple tastings. Scientists have long assumed that our ability to even taste those flavors is rooted in self-defense — a way to root out and avoid potentially poisonous plants in the diet of our hunting and gathering ancestors. But new research suggests that the ability to taste bitter flavors isn't strongly tied to hunting and gathering
lifestyles, which leaves researchers at a loss for why the skill might have evolved. My hypothesis, based on experience with espresso and IPA lovers: Perhaps there's an evolutionary advantage to beverage pretentiousness. — Maggie
More than 90% of land plants have symbiotic relationships with fungus and those relationships seem to date back hundreds of millions of years. At Topologic Oceans, Charles Soeder explains how this fact has become a jumping off point for an interesting theory about the evolution of land plants
— maybe all the plants we see in our daily land-locked lives are the result of symbiotic blending of algae and fungus, similar to the way our own cells now depend on the offspring of a bacterial invasion in order to function. — Maggie
Male fiddler crabs are famous for their mismatched front claws — one great big and threatening, one eensy-weensy. (I used to use this as a metaphor for the split in my SAT scores.) But what's really interesting about this lopsided look is that it seems to serve multiple purposes. The big claw can be used to attract lady crabs — wave it around and it becomes the crabby equivalent of, "Yo! Adrian!" But the big claw can also be used as a practical weapon, where two male crabs go at each other like fancy fencers with one arm behind their backs.
And the extent to which the big claw is for looks or for violence seems to vary a lot depending on the species of fiddler crab, writes scientist John Christy. Some have a lightweight claw that's better for waving at the girls, but weaksauce in a fight. Others have a heavy, dangerous claw that's difficult to use for long-distance flirting. Christy and his team are in the process of trying to figure out what selection forces leave some crabs optimized for love and others for the battlefield. In the meantime, though, they made this awesome crab fight video, set to a stirring, John Williams-esque soundtrack.
It's not too early to plan for next semester. John Hawks
, a fantastic science blogger and professor of anthropology at the University of Wisconsin-Madison is offering a Coursera class on Human Evolution: Past and Future
. Seems like just the thing for curious Happy Mutants! — Maggie
More than a quarter of primate species form male-female pair bonds that scientists describe as "monogamous". That's much higher than the overall mammal average of 9 percent. But those statistics don't mean that humans are somehow "meant" to be monogamous. In fact, scientists are still debating — and publishing conflicting theories — on why monogamy would have evolved at all
. Carl Zimmer has an interesting column at The New York Times looking at two recent papers, and how they fit into an ongoing scientific fascination with our own sex lives.
Good news for humanity's sense of shiny special uniqueness! Sure, other animals use tools. Chimpanzees and bonobos might even have behaviors that can be classified as cultural. But those damn dirty apes still can't throw a fastball to save their lives.
Becky Lang at Discover magazine has an interesting story on this research, which centers around the biology that allows fast pitches to happen, and how we developed it, while our closest relatives did not.
Scientists at the University of Copenhagen sequenced the oldest genome yet — 700,000-year-old DNA
from an ancient ancestor of the horse. The Nature Podcast explains why doing this is valuable
(and, no, it's not about creating a cloned ancient horse park) and how you go about sequencing such elderly, and thus degraded, DNA. — Maggie
History has shown us that even some of the greatest scientific luminaries, towering figures such as the naturalist Charles Darwin, the twice-Nobel-Laureate chemist Linus Pauling, and the embodiment of genius — Albert Einstein — have made some serious blunders.
Read the rest
As we all know by now, ducks have penises
. Rather epic penises
, in fact. Chickens, though, are penis-less. In fact, most birds don't have them. In an important update in duck sex news, Ed Yong follows the work of several scientists who are trying to better understand how genitals evolve and why they differ so much between species and genuses
. Bonus new fact: A dissected goose penis looks surprisingly like a less-colorful Man-O-War jellyfish. — Maggie