The digestive tract of teleost fish exhibits an impressive degree of histological diversity that reflects the range of feeding strategies found in this group. Detailed microscopic studies have ...

A new study analyzing the origins of the adipose fin, thought by some to be vestigial, finds that these fins arose repeatedly and independently in multiple species -- a striking example of convergent ...

Despite their obvious physical differences, elephants, lizards and trout all have something in common. They possess elongated, flexible structures at the rear of their bodies that we call tails. But a ...