Arturo Portnoy
@portna.bsky.social
Professor of Mathematical Sciences at the University of Puerto Rico, Mayagüez
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The pandemic ends when infections end, not when your attention span ends.
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The pandemic ends when infections end, not when your attention span ends.
"Why do you wear a mask?"
Why do you carry three guns to the supermarket?
Why do you carry three guns to the supermarket?
November 28, 2025 at 10:37 PM
"Why do you wear a mask?"
Why do you carry three guns to the supermarket?
Why do you carry three guns to the supermarket?
These assholes say maskers live in fear...
November 28, 2025 at 9:44 PM
These assholes say maskers live in fear...
April 2018 cover. Quiet, piggy!
November 25, 2025 at 5:25 PM
April 2018 cover. Quiet, piggy!
An image says more than a thousand words.
November 23, 2025 at 12:09 PM
An image says more than a thousand words.
Here we go... Again.
November 22, 2025 at 1:31 PM
Here we go... Again.
Buckle up. Again.
November 21, 2025 at 11:49 PM
Buckle up. Again.
COVID PR
Desde diciembre 2021 no tenemos niveles tan bajos de positividad.
Desde diciembre 2021 no tenemos niveles tan bajos de positividad.
November 20, 2025 at 9:38 AM
COVID PR
Desde diciembre 2021 no tenemos niveles tan bajos de positividad.
Desde diciembre 2021 no tenemos niveles tan bajos de positividad.
If this graph does not send chills up your spine, you may be a statistic already.
November 18, 2025 at 2:06 PM
If this graph does not send chills up your spine, you may be a statistic already.
Not one decent cell in his body. 🎯
November 13, 2025 at 4:05 PM
Not one decent cell in his body. 🎯
Disgusting rapist and pedophile...
November 12, 2025 at 6:30 PM
Disgusting rapist and pedophile...
