"Such an event would have rapidly buried these trilobites that were living in shallow waters near the shoreline, with the volcanic ash quickly moulding and cementing these animals in place," he said.

The research, involving a comprehensive analysis of body size evolution in trilobites—a highly representative group ... like mammals and birds, species living in colder climates tend to be larger than ...

Learners will understand that living things have changed over time based on fossil evidence. 1. Download the PowerPoint presentation (PPT 5.9 MB) above. Using the first slide, introduce trilobites and ...