Changes

| style="height:20px; width:200px; text-align:center;" |TextMillions of years ago the '''arctic fox''' had dark [[fur]] and lived in the woods. When it snowed they were not very well [[camouflage]]d and found it difficult to hunt. [[Variation]] meant some had slightly lighter coloured [[fur]] and were able to get more food so they had more [[offspring]].| style="height:20px; width:200px; text-align:center;" |TextThe next [[generation]] inherited the trait of slightly lighter coloured fur. [[Variation]] meant that some were born with even lighter [[fur]]. Those were more likely to survive and have [[offspring]].| style="height:20px; width:200px; text-align:center;" |TextIn the [[arctic]] [[habitat]] eventually all the foxes with dark [[fur]] became [[Extinction|extinct]] and only ones with white [[fur]] were left.