[Rockhounds] An early Miocene extinction in pelagic sharks

[Paul]

Mysterious event nearly wiped out sharks 19 million
years ago By Yasemin Saplakoglu, Live Science
https://www.livescience.com/mysterious-shark-extinction-19-million-years-ago.html

It's unknown whether the ancient sharks died off in a single
day, weeks, years or even thousands of years.

The paper is:

Elizabeth C. Sibert and  Leah D. Rubin, 2021
An early Miocene extinction in pelagic sharks
Science  04 Jun 2021: Vol. 372, Issue 6546, pp. 1105-1107
DOI: 10.1126/science.aaz3549

More recent "extinctions."

2 types of flu viruses may have gone extinct
By Rachael Rettner, Live Science, June 3, 2021
https://www.livescience.com/flu-virus-types-extinct-covid-19.html

A pandemic upside: The flu virus became less
diverse, simplifying the task of making flu shots
Helen Branswell, Stat, June 2, 2021
https://www.statnews.com/2021/06/02/pandemic-upside-flu-virus-became-less-diverse-simplifying-task-of-making-flu-shots/

Yours,

Paul H.