Chicks that are competing with siblings or whose parents are likely to die or switch partners tend to be less honest when begging for food, research into sibling rivalry in birds by Oxford University scientists has found.
Researchers who examined family genealogies from Finland found that the presence of same-sex elder siblings increased the probability that people would disperse to new lands, whereas having opposite-sex siblings had less ...
When predicting future global population growth, sometimes scientists look to the past. Using a database with historical records that began in 871 A.D., an anthropologist at the University of Missouri was able to show reproductive ...
The textbook "monogamy hypothesis" argues that monogamy favors the evolution of cooperation by increasing sibling relatedness, since helpers are as related to the full siblings that they care for as they are to their own ...
When I was ten years old my father, a lawyer, was incarcerated. He was what some people call a "white collar criminal" and spent two years in prison. Because I come from a loving family and because my family had other supports ...
The banded mongoose, a small social mammal of the African savannah, is known to be one of the most cooperative and helpful of all animals.
For a young male western bluebird, it might be better to live with one's parents as a helper for a year before starting a nest of one's own, according to a new study in Behavioral Ecology.
First-borns are responsible, middle children are people pleasers and the youngest are attention seekers, we often hear. But scientists have failed to find any real evidence for a link between birth order and personality.
A first-of-its-kind, nationally representative study of siblings supports previously published research on unrelated individuals that links specific genotypes to educational attainment among adults in their mid-20s to early ...
Life as a wild baby bird can involve a lot of stress; competing with your siblings, dealing with extreme weather, and going hungry due to habitat loss are just a few examples. However, birds have an amazing capacity to overcome ...
Nov 07, 2016
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