This undated handout photo provided by the Butterfly Conservation shows a Comma butterfly. A new study in Science shows that species across the world are moving further away from the equator and higher in elevation and doing so faster than before because of global warming. This is a photograph of a comma butterfly, which has moved north 135 miles in just 21 years in Great Britain. (AP Photo/Butterfly Conservation, Jim Asher)

Associated Press
This undated handout photo provided by the Butterfly Conservation shows a Comma butterfly. A new study in Science shows that species across the world are moving further away from the equator and higher in elevation and doing so faster than before because of global warming. This is a photograph of a comma butterfly, which has moved north 135 miles in just 21 years in Great Britain. (AP Photo/Butterfly Conservation, Jim Asher)
This undated handout photo provided by the Butterfly Conservation shows a Comma butterfly. A new study in Science shows that species across the world are moving further away from the equator and higher in elevation and doing so faster than before because of global warming. This is a photograph of a comma butterfly, which has moved north 135 miles in just 21 years in Great Britain. (AP Photo/Butterfly Conservation, Jim Asher)
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