Island tiger snakes' skulls adapt to eat large sea bird chicks

A study by researchers from the University of Adelaide and other institutions has found that in a population of island tiger snakes, the bones in their jaws increase in length after feeding on large prey, while their mainland ...

The reproductive advantages of large male fish

In mosquitofish, of the genus Gambusia, male fish are smaller than females—sometimes only half the size. Biologists had previously assumed that smaller male mosquitofish had at least some reproductive advantages. Researchers ...

The evolutionary puzzle of the mammalian ear

The vertebrate ear is a remarkable structure. Tightly encapsulated within the densest bone of the skeleton, it comprises the smallest elements of the vertebrate skeleton (auditory ossicles) and gives rise to several different ...

What does it mean to be human?

The Rock of Gibraltar appears out of the plane window as an immense limestone monolith sharply rearing up from the base of Spain into the Mediterranean. One of the ancient Pillars of Hercules, it marked the end of the Earth ...

Sanction mechanism identified between ants and host plants

In nature, many forms of plant-animal mutualism exist in which each partner benefits from the presence of the other. Although mutualistic interactions offer advantages for both partners, they are nonetheless a source of conflict.

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