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.
"Noseleaves" may significantly enhance some bat species' echolocation abilities.
How should you treat your ducks? The answer is mired in duckling politics.
Sleep hormone melatonin may be linked to daily movements of tiny ocean creatures.
Humans may have evolved a visual spider “template” to warn us of danger.