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christopherrolson.bsky.social
Associate Professor of Physiology at Midwestern University | Neuro 🧠 |Ornithologist 🦉 | Grand Canyon enthusiast | Natural History | All things Arizona 📸
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I hiked up 👻-creek, that confluences onto Bright Angel Cr above the ranger station. My feet were in the water all day, and many plunge pools, waterfalls and thickets had to be crossed. It was a good way to spend a hot day in the Canyon. Note to self- pack a dry bag for the poor camera. #GrandCanyon

submitted 18 hours ago • 0 comments

Whether you think of them as ‘government goats’ or ‘watchable wildlife’, you have to admit the Grand Canyon provides unmatched opportunities to encounter wild animals. Just remember, it is illegal to feed them. Here are some photos of some critters from my recent hike into the Canyon. #grandcanyon

submitted 23 hours ago • 0 comments

Canyon Treefrogs- Hyla arenicolor -live along rocky creeks in the Grand Canyon and throughout the Southwest. They have a loud call for such a small frog, that to me sounds like a goat. They also vary a lot in color, from nearly white to dark brown.

submitted 1 day ago • 0 comments

Zoroaster Temple, La Lune & Venus #GrandCanyon #astrophotography

submitted 2 days ago • 0 comments

Red Mountain Trail, north of Flagstaff.

submitted 5 days ago • 0 comments

Why not me? Look around. Trump has broken every rule. So no, I won’t wait my turn. #FoxxForAZ #AZ07 #AZ07Debate

submitted 18 days ago • 2 comments

Thank you Penn State for the beautiful write up highlighting our grant, what we hope to accomplish, and why we think it will have major impact. www.psu.edu/news/huck-in...

submitted 20 days ago • 1 comment

I'll never forget the incredible feeling of watching a haboob (dust storm) roll off the top and into the deep chasm of the Grand Canyon on July 21, 2021. The blast of air and barrage of lightning that finally hit us caused hundreds of sightseers to flee back towards their vehicle.

submitted 26 days ago • 5 comments

An unusual couple of nesters has attracted the attention of Portland-area birders drawn to a story about the peculiarities of nature.

submitted 26 days ago • 10 comments

Teeth have surprising origins as sensory tissue on the bodies of jawless fishes. I can only imagine what a toothache must have felt like to these ancient critters.

submitted 36 days ago • 2 comments

This study shows that communication between the visual cortex and the brain's #language system is necessary for the representation of object knowledge in the #VisualCortex and for corresponding behaviors in humans @plosbiology.org 🧪 plos.io/4k1Jkoz

submitted 36 days ago • 0 comments

According to Rivian, the R2’s harness is 44 pounds (20 kilograms) lighter and uses 2.3 miles fewer wires, as well as 60% fewer in-line connectors. insideevs.com/news/760143/...

submitted 37 days ago • 2 comments

2023. #DEI End the glaring inequity in international science collaborations. The world’s natural-science research ecosystem remains focused on the priorities of high-income countries. Funders, publishers and scholarly databases can do more.... to rebalance www.nature.com/articles/d41...

submitted 36 days ago • 0 comments

americanornithology.org/aos-announce...

submitted 36 days ago • 0 comments

The buffy edges on this juvenile Costa’s Hummingbird feathers are so pretty. And there’s a small hint of the green and purple plumage that he is growing into. #birds #hummingbirds #🪶

submitted 40 days ago • 0 comments

How does that song go — ….My true love gave to me a tanager in a peach tree? #🪶#birds

submitted 41 days ago • 0 comments

#🧪 I’m not sure the context of this visual communication, but it seems friendly.

submitted 43 days ago • 0 comments

It’s been dusty. Views from Picacho Peak #landscape #desert #Arizona

submitted 45 days ago • 0 comments

Duck chase #🪶

submitted 45 days ago • 0 comments

Here is a splendid study on how and when eavesdroppers may learn to discriminate #🧪 royalsocietypublishing.org/doi/10.1098/...

submitted 50 days ago • 0 comments

I love when science appears in unique places. My husband has been performing in death metal bands since we were in high school - this study calms some of my fears about his throat health. Plus, it's just exceptionally cool. 🧪https://www.sciencefriday.com/articles/death-metal-singers-vocal-research/

submitted 56 days ago • 0 comments

I got up early to get Saturday morning to getMilky Way photos, but I mostly shot twilight and dawn photos, as seen from the Superstition Mountains in Arizona. #landscapes #Arizona #MilkyWay

submitted 59 days ago • 0 comments

2025. For the first time, wild chimpanzees have been pictured eating and sharing 'boozy' fruit. Guinea-Bissau's Cantanhez National Park. phys.org/news/2025-04...

submitted 65 days ago • 0 comments