The top row shows variation in a zooplankton, Daphnia: the morph on the right is produced in the presence of a predator cue. The second row shows an example of dimorphic variation in horn length ...

"I expected some variation." Scientists stunned by striking behavior shift across hundreds of animal species: 'That is not always correct' first appeared on The Cool Down.

Environmental stress in evolution can be reframed as a powerful engine of innovation, not simply a barrier to survival.

You have full access to this article via your institution. We then determined mean strain differences in 36 commonly assessed behavioral measures to compare between-experiment variation for the ...

This clip can be used as a starting point for a topic on variation and how animals are suited to their environment. Pupils, in pairs or small groups, could choose one of the animals featured in ...

Biological sex is also an inherited variation - whether you are male or female is a result of genes you inherited from your parents. Characteristics of animal and plant species can be affected by ...