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These same plants that provide shelter and produce nourishing nectar to feed the insects also make chemicals that send them into a defensive frenzy, forcing them into retreat.


 ant plant defense chemical weapon
When we fall under the spell of a charismatic figure, areas of the brain responsible for scepticism and vigilance become less active. That's the finding of a study which looked at people's response to prayers spoken by someone purportedly possessing divine healing powers. ... Schjødt says that this explains why certain individuals can gain influence over others, and concludes that their ability to do so depends heavily on...


 prayer healer charisma authority reliance trust religion politics brain defense
Scientists have uncovered the mechanism behind the menacing "hood flare" which cobras use as a defensive display.


 snake cobra defense
Farmers in Cameroon have expressed doubts over a UN suggestion to use pepper spray guns to stop stampeding elephants destroying crops.


 elephant field chilli defense Africa toread
Researchers have revealed more detail about the evolutionary "arms race" between bats and moths. One study in the journal Current Biology has shown how a species of bat uses a quiet "stealth mode" of the clicks it uses to locate its prey. Another from a Royal Society journal showed that a moth can distinguish between clicks that mean it has been spotted, and clicks that mean a strike. This allows the moths to choose...


 moth bat echolocation evolution sound navigation defense
Rarely does a day go by in Baghdad nowadays without somebody somewhere in the city being killed or injured by two new tactics adopted recently by insurgents: sticky bombs and silenced weapons.


 Iraq insurgency invastion bomb defense
A female grizzly bear has killed a man out on a hike with his wife in the US after the couple apparently surprised the bear and its cubs, officials say.


 grizzly bear USA hiking cub mother defense killing