Answer to Dictation 1
Around 90 per cent of people worldwide are right-handed.
Go to Dictation 2
Answer to Dictation 2
The answer is because of two features of human evolution.
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Answer to Dictation 3
The first is walking on two legs and the other is the large size of the human brain.
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Answer to Dictation 4
Our large brain worked out many things to do with our hands.
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Answer to Dictation 5
This became useful for things like hunting and cooking.
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Answer to Dictation 6
The key to finding the answer was why only humans are largely right-handed.
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Answer to Dictation 7
Researchers compared human behaviour and brain patterns with 41 species.
Go to Dictation 8
Answer to Dictation 8
Humans have longer legs compared to their arm length.
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Answer to Dictation 9
Another reason is that the left side of the brain controls the right hand.
Go to Dictation 10
Answer to Dictation 10
By looking across many primate species we can begin to understand.
See the being right-handed lesson for the whole text.
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