Origami-inspired self-locking foldable robotic arm

A research team of Seoul National University led by Professor Kyu-Jin Cho has developed an origami-inspired robotic arm that is foldable, self-assembling and also highly-rigid. (The researchers include Suk-Jun Kim, Dae-Young ...

Why do animals hide their warning signals? A paradox explained

Scientists have understood quite well why so many poisonous animals have brightly colored bodies - the colors send a message to the predators: " don't eat me, or you'll get sick and die". But why some toxic animals actually ...

Antarctic birds recognize individual humans

You may have heard of crows, magpies, and mockingbirds recognizing individual people. These birds live among people, so it may be natural that they learn to differentiate people. But what about the animals that live in remote ...

A small vortex on the wing makes the elegance of birds' flight

One mystery of birds' flight is solved! The elegance of birds' flight, their seemingly effortless aerial turns and the softness of their landing, have been envied by many people. From countless observations, it has been known ...

Birds 'weigh' peanuts and choose heavier ones

Many animals feed on seeds, acorns or nuts. The common feature of these are that they have shells and there is no direct way to know what's inside. How do the animals know how much and what quality of food is hidden inside? ...

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