Changes

== Animals ==

== Animals ==

Animal migration presents marvellous examples of good design:  how do many creatures find their way to their destination?

Animal migration presents marvelous examples of good design:  how do many creatures find their way to their destination?

Each year, a few towns in [[California]] are greeted by the arrival of tens of thousands of [[monarch butterfly|monarch butterflies]].  [[Pacific Grove]], California, is the peculiar destination of a huge quantity of such butterflies each year.

Each year, a few towns in [[California]] are greeted by the arrival of tens of thousands of [[monarch butterfly|monarch butterflies]].  [[Pacific Grove]], California, is the peculiar destination of a huge quantity of such butterflies each year.