[Rockhounds] Trilobites Exhibit Complex Social Behavior 480 Million Years Ago

[Paul]

Trilobite Fossils Show Conga Line Frozen for 480 Million Years
The orderly collection of ancient arthropods suggests that
complex social behavior goes way back in the history of life on Earth.
New York Times, Trilobites, By Becky Ferreira, Oct. 17, 2019
https://www.nytimes.com/2019/10/17/science/trilobites-fossils-marching.html

The open access paper is:

Jean Vannier, Muriel Vidal, Robin Marchant, Khadija El Hariri, Khaoula
Kouraiss, Bernard Pittet, Abderrazak El Albani, Arnaud Mazurier &
Emmanuel Martin, 2019, Collective behaviour in 480-million-year-old
trilobite arthropods from Morocco. Scientific Reports volume 9, Article
number: 14941
https://www.nature.com/articles/s41598-019-51012-3

Yours,

Paul H.