– by Caroline B. Smith & Edward H. Hagen Humans are sexually dimorphic, meaning there tend to be differences between men and women on traits like height and weight. In our study we focused on the sexual dimorphism in muscle mass: men have more muscle mass than women. Why? The standard story is that higher […]
– By Carlota Batres When it comes to children, women can be certain that a child is theirs, but men cannot. In other words, there is always some chance that another man fertilized the woman’s egg. The estimate of children who have genetic fathers different from their alleged fathers is between 1%-3%. One of the […]
– By Ángel Luis González Esteban & Francisco Marco-Gracia For centuries, scientists have pondered a fundamental question: is there a biological trade-off between reproduction and longevity? In simpler terms, does having more children mean a shorter lifespan for mothers? This is a core idea in evolutionary theory, suggesting that bodies have limited resources, and investing […]
HBES stands in defense of the values of scientific inquiry and in opposition to censorship and the defunding of peer-reviewed research projects in the US whose grants were awarded by agencies and processes that have been subject to congressional oversight for decades. We support worldwide rallies in March 2025 calling for continued public funding of […]
– by Jakub Fořt & Jan Havlíček Why do some individuals direct their sexual behavior exclusively toward individuals of the same sex? This is often viewed as an “evolutionary conundrum” or “evolutionary enigma” because same-sex attraction does not lead to reproduction – and yet it persists. Robust evidence from all around the world shows that […]
– by Yohsuke Ohtsubo Men are riskier than women, which is one of the most robust findings in psychology. When compared to women, men tend to report that they seek more risks in psychometric studies. In laboratory studies, men tend to show riskier behaviors, such as expanding a computerized balloon to the point of exploding […]
– by Lindsie Arthur Competition is woven into nearly every aspect of human life, often in ways we don’t consciously notice. Whether striving for promotions, signalling status in social groups, or competing in dating markets, competition shapes our interactions and decisions. But what fuels these competitive processes? One possibility is that hormonal fluctuations influence competition […]
– by Luke Glowacki When I set out to write my recent article The Controversial Origins of War and Peace: Apes, Foragers, and Human Evolution, I hoped to provide clarity on the heated debate about the role of war and peace in human evolution. Is warfare part of our evolutionary legacy, or did it emerge […]
As a celebration of Darwin’s birthday, HBES is proud to announce our presence on a new social media platform – HBES now has an account on Bluesky! We will start posting news and updates under our Bluesky account name (@HumBehEvoSoc.bsky.social). This is the same as our Twitter (X) handle (@HumBehEvoSoc), except formatted for Bluesky. The […]
HBES has recently had to renegotiate our contract for our society’s journal, Evolution and Human Behavior (EHB), with the publisher, Elsevier. It had traditionally been part of this contract that HBES pays for the mailing of print copies to members who request a print copy. This costs the society a fair bit of money in […]