Why did trilobites go extinct?

[Oxytropidoceras]

Why did trilobites go extinct?

By Donavyn Coffey, Live Science, November 2020

https://www.livescience.com/why-trilobites-went-extinct.html

 

The open access paper is:

 

Jonathan L. Payne, Alexandra V. Turchyn, Adina Paytan, 

Donald J. DePaolo, Daniel J. Lehrmann, Meiyi Yu, and 

Wei, Calcium isotope constraints on the end-Permian 

mass extinction. PNAS May 11, 2010 107 (19) 8543-8548

https://www.pnas.org/content/107/19/8543

 

A totally unrelated article is:

 

The role of cat eye narrowing in cat-human communication

by Ellie Bennett, Snippet Science, November 2020

https://www.snippetscience.com/the-role-of-cat-eye-narrowing-in-cat-human-communication

 

The open access paper is:

 

Humphrey T, Proops L, Forman J, Spooner R and McComb

K. The role of cat eye narrowing movements in cat-human

communication. Sci Rep. 2020 Oct. 10, 16503

https://doi.org/10.1038/s41598-020-73426-0

 

Yours,

 

Paul H.