Scientists have known for years that mirror-like tissue in reindeer eyes changes color from a greenish gold in the summer to vivid blue in the winter, a process that is thought to amplify the low ...

The iridescent layer is a colour-changing marvel that transformed with the seasons. When it is carved in two like this, the startling colours of the reindeer eye become obvious. Part of the national ...

Scientists have discovered reindeer use a special form of night vision to help them find food in the colder months. The surface of their eye changes from golden-orange in summer to a rich blue ...