Painting by numbers

Individuals of a particular species generally differ from one another. We are clearly most adept at recognizing members of our own species, although dog and cat owners will be ready to confirm that their pets look unique. ...

Why are there redheads? Birds might hold the clues

Red coloration—historically seen as costly in vertebrates—historically seen as costly in vertebrates—might represent some physiological benefit after all, according to research published in the journal Physiological ...

B-Raf and C-Raf proteins turn mouse white

Mice with black fur that turns white? Specialist cancer researchers from Inserm, CNRS, the Institut Curie and the Université Paris-Sud have taken steps to better understand the development of skin cells responsible for pigmentation ...

Birds' eye view is far more colorful than our own

The brilliant colors of birds have inspired poets and nature lovers, but researchers at Yale University and the University of Cambridge say these existing hues represent only a fraction of what birds are capable of seeing.

Study of stem cell diseases advanced by new technique

A rare genetic disease called dyskeratosis congenita, caused by the rapid shortening of telomeres (protective caps on the ends of chromosomes), can be mimicked through the study of undifferentiated induced pluripotent stem ...

Skin color: Handy tool for teaching evolution

Variations in skin color provide one of the best examples of evolution by natural selection acting on the human body and should be used to teach evolution in schools, according to a Penn State anthropologist.

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