adaptation
grrlscientist | April 23, 2008tags: researchblogging.org, evolution, speciation, Pod Mrcaru lizard, Podarcis sicula, reptiles
Pod Mrcaru lizard, Podarcis sicula.
Image: Anthony Herrel (University of Antwerp) [larger view]
Evolution has long been thought to occur slowly, due to small and gradual genetic changes that accumulate over millions of years until eventually, a new species arises. However, recent research has been calling this assumption into question. According to a study that was just published by an international team of scientists, dramatic physical changes can occur very rapidly -- on the order of just 30…
grrlscientist | January 24, 2008tags: researchblogging.org, neotropical ants, Cephalotes atratus, parasitic nematodes, Myrmeconema neotropicum, tetradonematid nematode, evolution, coevolution, fruit mimicry
A neotropical black ant, Cephalotes atratus,
infected with the newly described parasitic nematode,
Myrmeconema neotropicum.
The ant's infected and swollen abdomen does not actually take on a red pigment.
It becomes a translucent amber. With the yellowish parasite eggs inside and a touch
of sunlight, it appears bright red.
Image: Steve Yanoviak, University of Arkansas.
In the first known example of a parasite…
laelaps | November 3, 2007After many false starts I've actually started to write my "treatise" on evolution, some of the pages I've been turning out being in note form (I want to get the ideas down and then fill in the exact details later when I can pick up the proper reference books from the shelf) while others resemble actual passages and are in a near-finished form. My work isn't going to be a chronological overview of the history of life like many other books, but will instead take a more personal approach reflecting how I've come to understand evolution and how it proceeds. Differing rates of change, convergence…
laelaps | October 17, 2007"Thinking again?" the Duchess asked, with another dig of her sharp little chin.
"I've a right to think," said Alice sharply, for she was beginning to feel a little worried.
"Just about as much right," said the Duchess, "as pigs have to fly...."
[Alice's Adventures in Wonderland, Chapter 9]
It seems that creationists/ID advocates aren't the only folks discontented with Darwin's theory of natural selection, as I have been hearing murmurings that some scientists are considering genetic changes to be far more important to evolution. It's been difficult to find details about this "phantom menace…