For those of us whose memory of high school biology hasn’t faded entirely, planarians will probably sound very familiar. They’re generally used as an example of one of the extreme ends of regenerative ...

Formation of the body axes is a critical part of embryonic development. They guarantee that all body parts end up where they belong and that no ears grow on our backs. The head-tail axis, for example, ...

Despite all the variation this long history has given rise to, they almost all share similar components: a capsid, a tail tube, and a tail tip. A phage capsid sits like a head atop the narrow tail ...