Gold Shaw Farm shows how to tell male and female ducks apart with ease. As California highway slides toward sea, the fix will ...

Male and female black widow spiders exhibit striking sexual dimorphism. Females are significantly larger, darker, and possess the iconic red hourglass, indicating their dominance and reproductive role ...

Male and female black widow spiders may belong to the same species, but they are far from identical. From size and colour to behaviour and lifespan, these spiders display some of the most striking ...

IFLScience needs the contact information you provide to us to contact you about our products and services. You may unsubscribe from these communications at any time.

Ironically, though, that’s wonderful news for palaeontologists, as the love scars left behind by these prehistoric couplings ...