The color-shifting displays prevalent in nature could puzzle potential predators.
More evidence that members of the tyrannosaur family fought and ate each other.
Shocking ploy helps spiders catch prey.
Northern gannets avoid buckling their necks by choosing the right diving speed.
Hungry hippos heft grass from African savannahs to rivers.
Winners of insects' territorial contests have brighter UV-reflecting wing patches.
Organic farming techniques don't increase milk's nutritional value.
The extraordinary way a kangaroo uses its tail.
Spiders use moths' sense of smell against them.
Competition within species ebbs and flows and sometimes leads to extinction.