Mark Hayward
mdhayward.bsky.social
Mark Hayward
@mdhayward.bsky.social
Population health scientist and demographer. Science thrives on honesty, honor,and commitment to others. Cat dad to two girls who are vying for the record of the longest lived cats.
My head spins when I see vaccine resistance—especially for children. Children’s lives in today’s world are at serious risk because of vaccine resistance. How do I know?Because of a real life counterfactual. Yeah, science
September 5, 2025 at 11:16 PM
Summer in Austin is now 24 days longer than it was 30 years ago. A longer summer is the case just about everywhere in the US. Maybe that’s why the feds are closing down climate research and disappearing the data.
August 24, 2025 at 2:09 PM
Changing trains in Vienna today and what did my little eye spy? Why a sign with a street name honoring one of the great philosophers of science, Karl Popper. It was clear that I wasn’t in the United States, LOL.
May 28, 2025 at 5:12 PM
This bowl used to be full. Now, the bunny and egg populations are declining. Like what happened during the pandemic—excess mortality. That’s what happens when the granddaughter doesn’t visit at Easter and the Easter Bunny brings quality chocolate.

And then there were only 4….
April 25, 2025 at 10:00 PM
No penguins were harmed in this protest.
April 5, 2025 at 2:03 AM
As I write tenure letters for American faculty being recruited to positions outside the US.
March 31, 2025 at 1:49 AM
We may have reached this point.
February 15, 2025 at 8:49 PM
Perhaps Trump ought to rethink those tariffs…or at least advise Americans that they might want to run to the toilet paper aisle in their local grocery store.

Oops!
February 1, 2025 at 7:34 PM
January 31, 2025 at 4:06 AM
Definitely Caturday at my home.
January 26, 2025 at 5:07 AM
Our kitty,Maudie, living her best life. Sleeping by the fire on Christmas morning.
December 25, 2024 at 5:17 PM
Here you go! Senior cat girls.
December 21, 2024 at 10:50 PM
I took pic in Bamberg, Germany, a few days ago. Bamberg is a city of cobblestones some of which are metal. They commemorate the Nazi atrocities toward the Jews in a very personal way—so that no one ever forgets. I’ll translate.
December 19, 2024 at 2:15 PM
I’m thinking about starting the Austin Feline Exceptional Longevity Study. My first two study participants are Birdie and Maudie. They are almost 19 years old and have complete biographical data including biomarkers back to birth. Whether they can survive longer than Crème Puff isn’t clear.
November 16, 2024 at 12:00 AM