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The oldest evidence of four-legged animals walking on land has been discovered in southeast Poland. Rocks from a disused quarry record the "footprints" of unknown creatures that lived about 397 million years ago.


 evolution leg walking
This means the caterpillar is able to "tell" an intruder to go away without risking injury in a conflict.


 caterpillar animal communication walking leg drumming
People's walking patterns - their gait - are so different they could be used to identify individuals. Gait can also be measured at a distance - an advantage over other forms of biometric identification.


 walking gait identification pattern
Moderate exercise increased the size of the hippocampus, an area of the brain that makes memories.


 memory exercise walking ageing
Scientists have filmed an African lungfish using two fins to walk and "bound" along the bottom of its tank.


 fish leg walking evolution fin
he speed someone walks may predict the likelihood of developing dementia later in life, according to researchers in the US. They also told a conference that grip strength in middle-age was linked to the chance of a stroke.


 dementia test stroke walking