I thought I should share what I learn today — trilobites. Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. The reason why it is so fascinating is that they were one of the most successful of all early animals, roaming the oceans for over 270 million years. They’ve developed eyes to see during that period too.
Here’s an excerpt from David Attenborough’s excellent documentary First Life on this specific topic.