Difference in body size (or sexual dimorphism) between males and females is common across the animal kingdom. One of the most extreme examples of sexual dimorphism is found in the cichlid fish species ...

How different are men and women's brains? The question has been explored for decades, but a new study led by Rosalind Franklin University neuroscientist Lise Eliot is the first to coalesce this ...

Sexual size differences are widespread in biology, yet the "how" behind them often remains vague. We asked a concrete question in a classic model organism: when female flies are larger than males, do ...

The largest males have bigger weapons, but smaller males have other advantages. Photo by Ummat Somjee When it comes to some members of the insect world, size variations can be mind-boggling. A ...