The crabs were found in India's Western Ghats region.

Like the males of many animal species, male Drosophila melanogaster fruit flies, a commonly studied lab animal, are aggressive toward one another and even fight when competing for resources such as ...

Spotted hyena clans flip the script on mammalian power: here, dominance is inherited, alliances matter most and females rule every level of society.

This week, the creators behind the simulation, or God, or whatever you want to call it, have blessed us with a rare freshwater crab that's both male and female. Hallelujah!