Gene mutation that makes dogs small existed in ancient wolves

Popular belief has been that small dogs, such as Pomeranians and Chihuahuas, exist because once dogs were domesticated, humans wanted small, cute companions. But in the journal Current Biology on January 27, researchers at ...

Study unlocks link between sex and female brain

An international team of scientists led by Gregg Adams at the University of Saskatchewan has discovered that a protein in semen acts on the female brain to prompt ovulation, and is the same molecule that regulates the growth, ...

How salt stops plant growth

Until now it has not been clear how salt, a scourge to agriculture, halts the growth of the plant-root system. A team of researchers, led by the Carnegie Institution's José Dinneny and Lina Duan, found that not all types ...

How the bat beats the lifespan rule

From the elephant to the mayfly, biologists say there is a general rule about longevity: the bigger the animal, the longer it lives.

A new role for cytokinin plant hormones

When plants, including crops, are exposed to environmental stresses such as drought or high salinity, abscisic acid (ABA), a stress-responsive hormone is synthesized to induce a protective response. At the same time, the ...

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