Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile Rachael has a degree in Zoology ...

Animals reproduce in one of two distinct ways: egg-laying or live birth. By studying an evolutionarily recent transition from egg-laying to live-bearing in a marine snail, collaborative research has ...

Until now however, there have been few opportunities to study these, mainly because most evolutionary changes happened so long ago. "By discovering and studying the recent evolutionary shift in the ...

A photo of the embryos that developed inside a live bearing female snail. Many different stages of development can be observed from just-fertilized, to fully-hatched miniature snails. Animals ...