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9 posts tagged with birds and evolution. (View popular tags)
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"Transmogrification event caused by incorporation of alien bacteria!!!"

Alien viruses from outer space and the great Archaeopteryx forgery [more inside]
posted by brundlefly on Jul 21, 2014 - 14 comments

Four wings good, two wings better?

The Rise and Fall of Four-Winged Birds [more inside]
posted by brundlefly on Oct 17, 2013 - 21 comments

Embryonic koro in birds

Cocks (almost) don't have a penis, a trait common to 97% of bird species, but they can grow one when the expression of the Bmp4 gene is prevented. The expression of this gene causes the percursor of the phallus in the chick embryo to undergo apoptosis (cell death) and Bmp genes are also involved in 3 other bird traits: feather development, toothlessness and beak shape. In penis-less bird species, copulation requires a sex maneuver nicknamed the cloacal kiss (in French) which requires a full cooperation of the female (3 min of tender parrot sex). In species where males have a penis, like ducks, females are less lucky: the coevolution of the rather convoluted morphology of male and female genitalia has been hypothezised to occur through sexual conflict [many previouslies]. The evolutionary mechanisms that drove phallus reduction in most birds species are still unknown.
posted by elgilito on Jun 11, 2013 - 20 comments

Sex crazed, but not too picky

Nature constantly engineers new and creative solutions to all sorts of problems—turning our stereotypes about sex upside-down along the way.
posted by Brandon Blatcher on Sep 17, 2012 - 16 comments

How to hatch a dinosaur

How to hatch a dinosaur: 'So making a chicken egg hatch a baby dinosaur should really just be an issue of erasing what evolution has done to make a chicken. Every cell of a turkey carries the blueprints for making a tyrannosaurus, but the way the plans get read changes over time as the species evolves.' [via]
posted by dhruva on Oct 7, 2011 - 54 comments

"Big Bird says it's time to wake up..."

A new round of genetic tests has confirmed it: The 'big lizards' of our childhood fantasies were more likely 'big birds.' In fact, they probably even had feathers, and looked more like this than this. Mind blowing, I know, but I guess this demonstrates that, despite what some may think, science really doesn't have a problem admitting that it got something wrong when new evidence comes to light.
posted by saulgoodman on Apr 24, 2008 - 75 comments

Nature gone Wild

Birds that rap and cows with accents. The big picture is urban adaptation, which is pretty cool. (...and the egg wins.)
posted by ewkpates on Dec 28, 2006 - 17 comments

Bye, bye birdie...

One fifth of all bird species are in danger of extinction. And right when we're finally understanding where they came from, too.
posted by jefgodesky on Jun 3, 2005 - 3 comments

Birds are not descended from Dinosaurs.

Birds are not descended from Dinosaurs. The latest in the ongoing debate about the origin of birds and whether they evolved from dinosaurs or from a earlier common ancestor. Chinese scientists report the discovery of a 120 million year old bird fossil that had feathers and could clearly fly.
posted by lagado on Dec 10, 2000 - 3 comments

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