Phoebe Cohen
@phoebefossil.bsky.social
Answering big questions with tiny fossils. Paleontologist, earth scientist, liberal arts professor, opinion holder. She/her. @makeaplanetpod.bsky.social
Boston and Camberville! See you Thursday! I am 99% done with this epic book and so excited to blather with @peterbrannen.bsky.social about it at @harvardbookstore.bsky.social
September 15, 2025 at 7:48 PM
Boston and Camberville! See you Thursday! I am 99% done with this epic book and so excited to blather with @peterbrannen.bsky.social about it at @harvardbookstore.bsky.social
Happy pub day to @peterbrannen.bsky.social and The Story of CO2 is the Story of Everything! Thanks for knowing how much this inscription would piss me off 🥰 #notboring #stillabillion
August 26, 2025 at 3:39 PM
Happy pub day to @peterbrannen.bsky.social and The Story of CO2 is the Story of Everything! Thanks for knowing how much this inscription would piss me off 🥰 #notboring #stillabillion
I've spent all morning making ggplot cross plots of confusing min/geochem on billion year old+ rocks and I have no idea what's going on but GOSH DO I LOVE DOING IT. Anyway if anyone wants to explain to me why there's an inverse relationship btwn TOC & kaolinite hit me up
@chrisjunium.bsky.social
@chrisjunium.bsky.social
August 26, 2025 at 3:37 PM
I've spent all morning making ggplot cross plots of confusing min/geochem on billion year old+ rocks and I have no idea what's going on but GOSH DO I LOVE DOING IT. Anyway if anyone wants to explain to me why there's an inverse relationship btwn TOC & kaolinite hit me up
@chrisjunium.bsky.social
@chrisjunium.bsky.social
OK so I've been pretty quiet on here for quite some time. I'm still trying to figure out how best to use this place in a way that is generative, sustainable, and (at least sometimes) fun.
Here's a sea lion I met last week at Carmel River Beach on a family trip to CA.
Here's a sea lion I met last week at Carmel River Beach on a family trip to CA.
August 25, 2025 at 12:53 PM
OK so I've been pretty quiet on here for quite some time. I'm still trying to figure out how best to use this place in a way that is generative, sustainable, and (at least sometimes) fun.
Here's a sea lion I met last week at Carmel River Beach on a family trip to CA.
Here's a sea lion I met last week at Carmel River Beach on a family trip to CA.
I finally found a reason to make one of these damned things. Thanks RFK you absolute goon!!!
February 15, 2025 at 6:48 PM
I finally found a reason to make one of these damned things. Thanks RFK you absolute goon!!!
Some rocks for ya
February 5, 2025 at 5:56 PM
Some rocks for ya
Here's (just about) what I told my students in my Co-Evolution of Earth and Life class this morning
February 5, 2025 at 4:14 PM
Here's (just about) what I told my students in my Co-Evolution of Earth and Life class this morning
The crust never forgets (except when it's eroded and/or subducted 😬)
February 3, 2025 at 6:35 PM
The crust never forgets (except when it's eroded and/or subducted 😬)
Shout out to my Canvas course transfer which has applied random dates to all of my assignments. So I guess the first assignment is for my students to build time machines! FUN!!!!
February 3, 2025 at 5:58 PM
Shout out to my Canvas course transfer which has applied random dates to all of my assignments. So I guess the first assignment is for my students to build time machines! FUN!!!!
good idea thank you!
January 29, 2025 at 8:34 PM
good idea thank you!
OK this time with @jacquelyngill.bsky.social 's suggestion:
January 29, 2025 at 8:06 PM
OK this time with @jacquelyngill.bsky.social 's suggestion:
Now with (hopefully) no spelling errors!
January 29, 2025 at 7:20 PM
Now with (hopefully) no spelling errors!
So as a helpful distraction from [[waves hands]] I decided to make myself a lab group logo. Here's my first pass. Any feedback?
January 29, 2025 at 3:46 PM
So as a helpful distraction from [[waves hands]] I decided to make myself a lab group logo. Here's my first pass. Any feedback?
Yesterday I had the chance to do pinhole photography for the first time in over 2 decades and it was fabulous. Quaker Oats container with a brass pinhole plate.
January 22, 2025 at 5:40 PM
Yesterday I had the chance to do pinhole photography for the first time in over 2 decades and it was fabulous. Quaker Oats container with a brass pinhole plate.
BTW the Paleozoic Pals are not dog toys. I repeat. They are not dog toys (except when they are 😬😬😬 ) pri-gift-shop.myshopify.com/collections/...
December 17, 2024 at 9:20 PM
BTW the Paleozoic Pals are not dog toys. I repeat. They are not dog toys (except when they are 😬😬😬 ) pri-gift-shop.myshopify.com/collections/...
PRI also care for one of the largest invertebrate fossil collections in the US, with an estimated 7 million specimens (larger than the American Museum of
Natural History!)
Natural History!)
December 17, 2024 at 8:54 PM
PRI also care for one of the largest invertebrate fossil collections in the US, with an estimated 7 million specimens (larger than the American Museum of
Natural History!)
Natural History!)
One of my favorite things about this project, and so much of my work, is the vast array of scales in which the work takes place - from outcrops to electron microscopes. Here's a scanning electron microscope image of one of these apatite scale microfossils, showing bonkers sub-micron scale detail.
November 20, 2024 at 1:16 PM
One of my favorite things about this project, and so much of my work, is the vast array of scales in which the work takes place - from outcrops to electron microscopes. Here's a scanning electron microscope image of one of these apatite scale microfossils, showing bonkers sub-micron scale detail.
These rocks are from a place called Mount Slipper, right on the AK/Yukon border, on the land of the Tr’ondëk Hwëch’in people. Here's my other amazing colleague Justin Strauss looking out over the (snowy) ca. 800 million year old rocks where we collected these fossils.
November 20, 2024 at 1:14 PM
These rocks are from a place called Mount Slipper, right on the AK/Yukon border, on the land of the Tr’ondëk Hwëch’in people. Here's my other amazing colleague Justin Strauss looking out over the (snowy) ca. 800 million year old rocks where we collected these fossils.
I spent hoursssss trying to get this fossil and a handful of others on to these grids - and then I put them in my carry on luggage and flew them to Oxford U where Nick was at the time to examine them with their high res TEM microscope. Here's me in 2014 collecting the rocks that fossil is found in.
November 20, 2024 at 1:11 PM
I spent hoursssss trying to get this fossil and a handful of others on to these grids - and then I put them in my carry on luggage and flew them to Oxford U where Nick was at the time to examine them with their high res TEM microscope. Here's me in 2014 collecting the rocks that fossil is found in.