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Category Evolution
Tibetans Evolved to Survive Higher Altitudes
The Tibetan Plateau (map) rises more than 13,000 feet (4,000 meters) above sea level. At such heights, most people are susceptible to hypoxia, in which too little oxygen reaches body tissues, potentially leading to fatal lung or brain inflammation.
To survive the high life, many Tibetans carry unique versions of two genes associated with low blood hemoglobin levels, the researchers found.
Children Biased Towards Skin Color
“A white child looks at a picture of a black child and says she’s bad because she’s black. A black child says a white child is ugly because he’s white. A white child says a black child is dumb because she has dark skin. This isn’t a schoolyard fight that takes a racial turn, not a vestige of the “Jim Crow” South; these are American schoolchildren in 2010. Nearly 60 years after American schools were desegregated by the landmark Brown v. Board of Education ruling, and more than a year after the election of the country’s first black president, white children have an overwhelming white bias, and black children also have a bias toward white, according to a new study commissioned by CNN.”
VIA: -UNIQUE DAILY-
Strange History of the Sunflower
Size Matters: Eavesdropping on Sexual Signals
Adult male crickets produce loud song to attract females, but the song, which permeates the environment, can be overheard also by unintended receivers – such as young males unable to produce song due to a mutation they carry.
Until now researchers have not understood how non-singing male crickets use the song of singing males to modify their behavior or physical attributes to their advantage.
Now biologists at the University of California, Riverside have shed light on this mystery.
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