The biological history of leeches is difficult to study: Their tissue decomposes almost immediately, and their boneless bodies rarely fossilize. But a geological formation in Wisconsin preserved a ...

The fossil leech compared with a modern leech. Double arrows indicate the large caudal sucker used for attachment, single arrows indicate body annulations. A newly described fossil reveals that ...

It's active leech season, y'all. The slimy creatures are often seen the most during the dry summer months when waterbody size is reduced, which has been a trending thing in Texas due to the extreme ...