Actually I have had a couple reminders of tumblr recently.
In January, Emily Graslie of The Brain Scoop was the plenary speaker at a collections themed breakout meeting of one of my professional societies that was hosted here at my institution. She talked about her backstory and start in museum collections and how that grew into her career in science communications.
But she got her start here on tumblr! Posting specimen pics! Absolutely wild. I checked, I unfortunately was not following her back in the day and she's taken down her original tumblr content. But I followed so many blogs like that back when I was active here. I wonder how many are in this museum collections sphere I work in now?
(My PhD is in our university museum - my lab and office are in the museum itself, and I work in our research collection. I'm fully a museum person now. 💪)