Red-winged blackbird nestlings go silent when predators are near

If you're a predator that eats baby birds—say, an American Crow—eavesdropping on the begging calls of nestlings can be an easy way to find your next meal. But do baby birds change their begging behavior when predators ...

Breast milk as drug-delivery device

Treating sick babies with engineered breast milk could someday be a reality, according to an article in Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society. Modified cells in the liquid ...

Signs of bac­teria in the bovine fetus

Contrary to earlier assumptions, the intestines of newborn calves are not sterile, but contain DNA from various bacteria. Bacteria or their fragments originating in the mother may be significant to the development of the ...

Social cues are key to vocal learning in birds and babies

When a baby bird learns a song, is it simply mimicking and practicing its father's tune? Or do chicks learn by first putting out nonsensical sounds – akin to a human infant's babble – which they then build upon based ...

Toward lab-grown designer babies

It gives new meaning to the vulgarity "a piece of tail." The latest way of divorcing baby-making from the old-fashioned method not only involves no sexual relations, it doesn't even involve eggs and sperm. At least at first.

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