Dave Leavens
@daveleavens.bsky.social
160 followers 260 following 18 posts
Comparative psychologist and primatologist interested in communication. Recent papers: https://tinyurl.com/5n8dwtdz (Bard et al., 2025) https://tinyurl.com/52e5nc85 (Forman et al., 2025) https://tinyurl.com/997fchv3 (Leavens et al., 2025)
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daveleavens.bsky.social
On the positive side, if you're nearsighted, like I am, your distance vision starts to correct with advanced age. Silver linings. (No pun intended.)
Reposted by Dave Leavens
ricklane.bsky.social
Every tech update now is like: "Great news, the word processor you've relied on for twenty years has learned to juggle! Is it good at it? No! Does it help in any way? Of course not! Has it made it insufferable to use? Oh, absolutely."
daveleavens.bsky.social
Thank you for the kind words, Katie. Of course I remember your viva! I hope the editors select your commentary. This paper was led by my wife, Kim Bard, and, of course, our co-author, Heidi Keller, has been addressing these issues for many years. It was a joy to work with those two.
daveleavens.bsky.social
Shall I compare thee to a summer's day? 🤣😂
Reposted by Dave Leavens
rpsagainsttrump.bsky.social
Kristi Noem didn’t approve FEMA rescue teams for over 72 hours after the Texas floods, following a rule she imposed that required her personal sign-off on any operation over $100K.

This is inexcusable. She should resign.
Reposted by Dave Leavens
carlbergstrom.com
If any vaguely traditional media outlet had done what Grok did today it would be all over. Regulators would come down like a hammer.

Somehow, Grok will end up getting a pass. But this is not a user misbehaving on a channel; it was configured to behave this way by the platform owner.
carlbergstrom.com
I'm not going to repost any of the insane antisemitic conspiracy bullshit that grok is spewing today, but it highlights how absolutely essentially is that we not let LLMs become a form of epistemic grounding for our society.
Reposted by Dave Leavens
vestaeleuteri.bsky.social
🚨Second PhD chapter is out today! We show that elephants gesture intentionally to ask humans for food using many different gesture types!
Check it out 👉 tinyurl.com/elephant-int...
🧵TLDR 1/16
a baby elephant eating leaves from a tree with the word mealtime written below it
ALT: a baby elephant eating leaves from a tree with the word mealtime written below it
media.tenor.com
daveleavens.bsky.social
Hi Susana--evidently, the formal call for commentary proposals will go out, soon (possibly later this week), and the deadline will be part of that announcement.
Reposted by Dave Leavens
rebeccasear.bsky.social
A 2% wealth tax on UK's richest could have raised £160 billion in 32 years: “The top 40 families in the UK now own more wealth than 50% of the population, meanwhile 14.3 million people - including 4.3 million children - are living in poverty in the UK"

www.kcl.ac.uk/news/wealth-...
A 2% wealth tax on UK's richest could have raised £160 billion in 32 years
Report is the first dynamic analysis of a wealth tax on the UK wealth distribution.
www.kcl.ac.uk
daveleavens.bsky.social
Hi Susana,
I don't know, but I will find out and get back to you. Probably be at least a couple of days.
Reposted by Dave Leavens
rando.insalubrio.us
The James Webb Space Telescope has achieved a significant milestone by directly imaging exoplanet TWA-7b, a cold gas giant located 111 light-years from Earth! 🧪

www.nature.com/articles/s41...
The newly discovered exoplanet is highlighted with an orange arrow.  The star it orbits is black in this image.  The remaining two bodies to the left are both background galaxies.
daveleavens.bsky.social
Here we show that the skill of following pointing gestures was easily trained in 44 adult chimpanzees. We speculate that reports of apes' poor pointing comprehension likely stem from their inadequate learning histories, not their evolutionary histories.

dx.doi.org/10.1037/com0...
APA PsycNet
dx.doi.org
Reposted by Dave Leavens
gillianrbrown1.bsky.social
The new edition of 'Sense & Nonsense: Evolutionary Perspectives on Human Behaviour', co-authored with
@kevinlala.bsky.social , is available!

Get 30% off (promotion code ASPROMP8): global.oup.com/academic/pro...

Ebook is available on Kindle.

Thank you to Prof. Clark Barrett for the endorsement! 🧪
Image of cover of book called Sense and Nonsense: Evolutionary Perspectives on Human Behaviour, with a quote beside it saying, "Sense and Nonsense is the ultimate insider's guide to the history of one of our most ambitious attempts to understand ourselves" from Clark Barrett, University of California, LA.
daveleavens.bsky.social
One of my favorite authors went to the military parade in Washington, DC.
carlbergstrom.com
You all never going to guess where I’m at.
Reposted by Dave Leavens
drumrollplease.bsky.social
𝗜𝗳 𝘆𝗼𝘂 𝗼𝗿 𝘀𝗼𝗺𝗲𝗼𝗻𝗲 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄 𝗶𝘀 𝗽𝗿𝗼𝘁𝗲𝘀𝘁𝗶𝗻𝗴 𝗼𝗿 𝗽𝗹𝗮𝗻𝗻𝗶𝗻𝗴 𝘁𝗼, 𝘄𝗮𝘁𝗰𝗵 𝘁𝗵𝗶𝘀. ✊🏻
Reposted by Dave Leavens
Reposted by Dave Leavens
profjohndrury.bsky.social
'Covid data indicating low levels across the UK.
...
In England, the Covid test positivity rate continued to increase slightly but remains at low levels. Meanwhile, hospital admissions for Covid decreased and are at low levels.'

@bob-hawkins.bsky.social

substack.com/home/post/p-...
Covid Situation Report: May 8, 2025
Update on Covid providing information on prevalence and hospital admissions for England and its regions. This post is best viewed using the browser or Substack app.
substack.com
Reposted by Dave Leavens
Reposted by Dave Leavens
adriansoldati.bsky.social
Our new paper is out! 🐒🔊
We compared two wild chimpanzee populations and found that individuals adjust pant hoot acoustics based on context (feeding vs. travelling). Most patterns are shared, but subtle community differences may hint at a small role for vocal usage learning.
doi.org/10.1016/j.an...