The answer is more complicated than you might think.

In all vertebrates, mothers transfer variable amounts of hormones into eggs and embryos, which influence development and traits of offspring in later lives. In a recent study the researchers looked at ...

“Awkward” would probably be the most benevolent word I could use to describe the explosive launch into flight of the California quail. Certainly, the words graceful or athletic do not come to mind.

A white-browed sparrow weaver looks up at a neighbouring roost. Wolfgang Kaehler/LightRocket via Getty Images From afar, the acacia trees look like they have been decorated with grass pom-poms. The ...