Finally, the team found an enhancer in horseshoe crab cells that triggered activity in zebrafish gills. Horseshoe crabs are "living fossils" that emerged around 400 million years ago, and the ...

What is an Atlantic horseshoe crab? Atlantic horseshoe crabs ... The middle segment, the opisthosoma, contains the back gills and ridges that help with movement. The third segment is the tail ...

Animals with numerous hearts are a fascinating phenomena in the microscopic realm of biology. Amazing adaptations found in nature allow many species to flourish in their unique enviroments. Here are 8 ...